diff --git a/mangle/quick-bump.py b/mangle/quick-bump.py
index e4044f9..dd99e42 100755
--- a/mangle/quick-bump.py
+++ b/mangle/quick-bump.py
@@ -11,69 +11,113 @@ import argparse
 import shutil
 
 parser = argparse.ArgumentParser()
-parser.add_argument("--pkg",
-                    help="Package name to bump (can be comma delimited list)",
-                    required=True)
+parser.add_argument(
+    "--pkg", help="Package name to bump (can be comma delimited list)", required=True
+)
 parser.add_argument("--branch", help="Package branch", required=True)
 parser.add_argument("--sig", help="Name of SIG that holds this package")
-parser.add_argument("--peridot-import", help="Tell peridot to import",
-                    required=False, action='store_true')
-parser.add_argument("--peridot-endpoint",
-                    help="Peridot API Endpoint (PERIDOT_ENDPOINT)",
-                    required=False, default="peridot-api.build.resf.org")
-parser.add_argument("--peridot-hdr-endpoint",
-                    help="Peridot HDR Endpoint (PERIDOT_HDR_ENDPOINT)",
-                    required=False, default="hdr.build.resf.org")
-parser.add_argument("--peridot-project-id",
-                    help="Peridot project ID (PERIDOT_PROJECT_ID)",
-                    required=False)
-parser.add_argument("--peridot-client-id",
-                    help="Peridot client ID (PERIDOT_CLIENT_ID)",
-                    required=False)
-parser.add_argument("--peridot-client-secret",
-                    help="Peridot client secret (PERIDOT_CLIENT_SECRET)",
-                    required=False)
-parser.add_argument("--dry",help="Do a dry bump for testing",
-                    required=False, action='store_true')
+parser.add_argument(
+    "--peridot-import",
+    help="Tell peridot to import",
+    required=False,
+    action="store_true",
+)
+parser.add_argument(
+    "--peridot-endpoint",
+    help="Peridot API Endpoint (PERIDOT_ENDPOINT)",
+    required=False,
+    default="peridot-api.build.resf.org",
+)
+parser.add_argument(
+    "--peridot-hdr-endpoint",
+    help="Peridot HDR Endpoint (PERIDOT_HDR_ENDPOINT)",
+    required=False,
+    default="hdr.build.resf.org",
+)
+parser.add_argument(
+    "--peridot-project-id",
+    help="Peridot project ID (PERIDOT_PROJECT_ID)",
+    required=False,
+)
+parser.add_argument(
+    "--peridot-client-id", help="Peridot client ID (PERIDOT_CLIENT_ID)", required=False
+)
+parser.add_argument(
+    "--peridot-client-secret",
+    help="Peridot client secret (PERIDOT_CLIENT_SECRET)",
+    required=False,
+)
+parser.add_argument(
+    "--dry", help="Do a dry bump for testing", required=False, action="store_true"
+)
+parser.add_argument(
+    "--rightmost",
+    help="see rpmdev-bumpspec; noop with --string",
+    required=False,
+    action="store_true",
+)
+parser.add_argument(
+    "--string", help="see rpmdev-bumpspec; trumps --rightmost", required=False
+)
 
 parser.add_argument("--git-user", default="Release Engineering")
 parser.add_argument("--git-email", default="releng@rockylinux.org")
-parser.add_argument("--url", default="ssh://git@git.rockylinux.org:22220/staging/src/{pkg}.git",
-                    help="override default URL")
-parser.add_argument("--change-user",
-                    help="Sets the user for the rpm changelog (first last <email>)",
-                    default="Release Engineering <releng@rockylinux.org>")
-parser.add_argument("--change-comment",
-                    help="Sets the comment that will appear in the changelog and commit message",
-                    default="Release tag bump for rebuild (https://sig-core.rocky.page/rebuild/)")
+parser.add_argument(
+    "--url",
+    default="ssh://git@git.rockylinux.org:22220/staging/src/{pkg}.git",
+    help="override default URL",
+)
+parser.add_argument(
+    "--change-user",
+    help="Sets the user for the rpm changelog (first last <email>)",
+    default="Release Engineering <releng@rockylinux.org>",
+)
+parser.add_argument(
+    "--change-comment",
+    help="Sets the comment that will appear in the changelog and commit message",
+    default="Release tag bump for rebuild (https://sig-core.rocky.page/rebuild/)",
+)
 
-args = parser.parse_args(args=None if sys.argv[1:] else ['--help'])
+args = parser.parse_args(args=None if sys.argv[1:] else ["--help"])
 user = args.change_user
 comment = args.change_comment
 
 if args.peridot_import:
-    peridot_api_endpoint = os.environ.get('PERIDOT_ENDPOINT') or args.peridot_endpoint
-    peridot_hdr_endpoint = os.environ.get('PERIDOT_HDR_ENDPOINT') or args.peridot_hdr_endpoint
-    peridot_project_id = os.environ.get('PERIDOT_PROJECT_ID') or args.peridot_project_id
-    peridot_client_id = os.environ.get('PERIDOT_CLIENT_ID') or args.peridot_client_id
-    peridot_client_secret = os.environ.get('PERIDOT_CLIENT_SECRET') or args.peridot_client_secret
-    print('Peridot import not supported yet')
+    peridot_api_endpoint = os.environ.get(
+        "PERIDOT_ENDPOINT") or args.peridot_endpoint
+    peridot_hdr_endpoint = (
+        os.environ.get("PERIDOT_HDR_ENDPOINT") or args.peridot_hdr_endpoint
+    )
+    peridot_project_id = os.environ.get(
+        "PERIDOT_PROJECT_ID") or args.peridot_project_id
+    peridot_client_id = os.environ.get(
+        "PERIDOT_CLIENT_ID") or args.peridot_client_id
+    peridot_client_secret = (
+        os.environ.get("PERIDOT_CLIENT_SECRET") or args.peridot_client_secret
+    )
+    print("Peridot import not supported yet")
     sys.exit(1)
 
 if os.geteuid() == 0:
-    print('DO NOT RUN AS ROOT')
+    print("DO NOT RUN AS ROOT")
     sys.exit(1)
 
 if args.sig:
-    default_url = 'ssh://git@git.rockylinux.org:22220/sig/%s/src/%s.git' % (args.sig, args.pkg)
+    default_url = "ssh://git@git.rockylinux.org:22220/sig/{sig}/src/{pkg}.git"
 
 if args.url:
-    default_url = getattr(args, 'url').format(pkg=args.pkg)
+    default_url = getattr(args, "url")
+
+rightmost = "--rightmost" if args.rightmost else None
+string = f"--string={args.string}" if args.string else ""
+
+extra_args = [arg for arg in (rightmost, string) if arg]
 
 # functions
-workdir = '/var/tmp'
+workdir = "/var/tmp"
 environment = os.environ
-pkgs = args.pkg.split(',')
+pkgs = args.pkg.split(",")
+
 
 def runcmd(cmd, action, package, env, pwd=workdir):
     """
@@ -82,56 +126,63 @@ def runcmd(cmd, action, package, env, pwd=workdir):
     try:
         subprocess.check_call(cmd, env=env, cwd=pwd)
     except subprocess.CalledProcessError as err:
-        sys.stderr.write('%s failed %s: %s\n' % (package, action, err))
+        sys.stderr.write("%s failed %s: %s\n" % (package, action, err))
         return 1
     return 0
 
+
 for pkg in pkgs:
     joined_dir = os.path.join(workdir, pkg)
-    spec_dir = os.path.join(workdir, pkg, 'SPECS')
-    print('Checking out ' + pkg)
-    gitcmd = ['git', 'clone', default_url, '--branch', args.branch,
-              joined_dir]
-    if runcmd(gitcmd, 'git clone', pkg, environment):
+    spec_dir = os.path.join(workdir, pkg, "SPECS")
+
+    checkout_url = default_url.format(pkg=pkg, sig=args.sig)
+
+    print(f"Checking out {checkout_url}")
+    gitcmd = ["git", "clone", checkout_url,
+              "--branch", args.branch, joined_dir]
+
+    if runcmd(gitcmd, "git clone", pkg, environment):
         continue
 
     files = os.listdir(spec_dir)
-    spec = ''
+    spec = ""
     for file in files:
-        if file.endswith('.spec'):
+        if file.endswith(".spec"):
             spec = os.path.join(spec_dir, file)
             break
 
     if not spec:
-        sys.stderr.write('Failed to find a spec for %s\n' % pkg)
+        sys.stderr.write("Failed to find a spec for %s\n" % pkg)
         continue
 
-    print('Bumping release of %s' % spec)
-    bumprel = ['rpmdev-bumpspec', '-D', '-u', user, '-c', comment, spec]
-    bumprel_old = ['rpmdev-bumpspec', '-u', user, '-c', comment, spec]
-    if runcmd(bumprel, 'rpmdev-bumpspec', pkg, environment):
-        print('Potentially old bumpspec version. Trying again.')
-        if runcmd(bumprel_old, 'rpmdev-bumpspec', pkg, environment):
+    print("Bumping release of %s (%s)" % (spec, extra_args))
+    bumprel = ["rpmdev-bumpspec", "-D", "-u",
+               user, "-c", comment, spec, *extra_args]
+    bumprel_old = ["rpmdev-bumpspec", "-u",
+                   user, "-c", comment, spec, *extra_args]
+    if runcmd(bumprel, "rpmdev-bumpspec", pkg, environment):
+        print("Potentially old bumpspec version. Trying again.")
+        if runcmd(bumprel_old, "rpmdev-bumpspec", pkg, environment):
             continue
 
-    print('Setting git user and email for this operation')
-    git_name = ['git', 'config', 'user.name', args.git_user]
-    git_mail = ['git', 'config', 'user.email', args.git_email]
-    if runcmd(git_name, 'git_name', pkg, environment, pwd=joined_dir):
+    print("Setting git user and email for this operation")
+    git_name = ["git", "config", "user.name", args.git_user]
+    git_mail = ["git", "config", "user.email", args.git_email]
+    if runcmd(git_name, "git_name", pkg, environment, pwd=joined_dir):
         continue
 
-    if runcmd(git_mail, 'git_mail', pkg, environment, pwd=joined_dir):
+    if runcmd(git_mail, "git_mail", pkg, environment, pwd=joined_dir):
         continue
 
-    print('Committing changes')
-    commit = ['git', 'commit', '-asm', comment, '--allow-empty']
-    if runcmd(commit, 'commit', pkg, environment, pwd=joined_dir):
+    print("Committing changes")
+    commit = ["git", "commit", "-asm", comment, "--allow-empty"]
+    if runcmd(commit, "commit", pkg, environment, pwd=joined_dir):
         continue
 
     if not args.dry:
-        push = ['git', 'push']
-        print('Pushing changes for %s' % pkg)
-        if runcmd(push, 'push', pkg, environment, pwd=joined_dir):
+        push = ["git", "push"]
+        print("Pushing changes for %s" % pkg)
+        if runcmd(push, "push", pkg, environment, pwd=joined_dir):
             continue
 
         shutil.rmtree(joined_dir)