diff --git a/hack/deploy_impacted.sh b/hack/deploy_impacted.sh
index 68c4dec5..43ea9107 100755
--- a/hack/deploy_impacted.sh
+++ b/hack/deploy_impacted.sh
@@ -12,7 +12,7 @@ return_if_impacted_targets_empty
 aws eks --region us-east-2 update-kubeconfig --name peridot-T8WbrA
 
 AWS_JWT="$(aws ecr get-login-password --region us-east-2)"
-B64_AWS_AUTH="$(echo -n "AWS:$AWS_JWT")"
+B64_AWS_AUTH="$(echo -n "AWS:$AWS_JWT" | base64)"
 mkdir -p ~/.docker
 echo '{"auths":{"893168113496.dkr.ecr.us-east-2.amazonaws.com":{"auth":"'"$B64_AWS_AUTH"'"}}}' > ~/.docker/config.json
 
diff --git a/hack/get_impacted_targets.sh b/hack/get_impacted_targets.sh
index c393f4aa..f8bd45d2 100755
--- a/hack/get_impacted_targets.sh
+++ b/hack/get_impacted_targets.sh
@@ -12,7 +12,7 @@ $BAZEL_B //:bazel-diff
 BASE_HASH="$PULL_BASE_SHA"
 TARGET_HASH="$PULL_PULL_SHA"
 if [[ -z "$TARGET_HASH" ]]; then
-  BASE_HASH="$(git log --pretty=format:"%H" --merges -n 1)"
+  BASE_HASH="$(git log "HEAD@{1}" --pretty=format:"%H" --merges -n 1)"
   TARGET_HASH="$PULL_BASE_SHA"
 fi