diff --git a/get-modified-packages/get-modified-packages.sh b/get-modified-packages/get-modified-packages.sh
index a9522dd8..6b736b69 100755
--- a/get-modified-packages/get-modified-packages.sh
+++ b/get-modified-packages/get-modified-packages.sh
@@ -15,7 +15,9 @@ while [ "${1-}" != "" ]; do
     shift
 done
 
+# base_branch is like "origin/main"
 base_branch="${args[0]}"
+echo "base_branch: $base_branch"
 
 # Check args
 if [ "$base_branch" = "" ]; then