diff --git a/.github/workflows/all-commits-in-master.yml b/.github/workflows/all-commits-in-master.yml
index 63f050a496..ff2735a4cc 100644
--- a/.github/workflows/all-commits-in-master.yml
+++ b/.github/workflows/all-commits-in-master.yml
@@ -11,16 +11,16 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0  # Fetch all history for accurate comparison
+          ref: ${{ github.ref }} # Check out the source branch
 
       - name: Check if commits exist in master
         run: |
           git remote add dc https://github.com/datacommonsorg/website.git
           git fetch dc
           MASTER_BRANCH="dc/master"
-          SOURCE_BRANCH=$(echo ${{ github.ref }})
 
           # Get the list of commits in the source branch that are not in the master branch
-          MISSING_COMMITS=$(git log --pretty="%H - %s" $MASTER_BRANCH..$SOURCE_BRANCH --)
+          MISSING_COMMITS=$(git log --pretty="%H - %s" $MASTER_BRANCH..HEAD --)
 
           if [[ -n "$MISSING_COMMITS" ]]; then
             echo "ERROR: The following commits are not present in $MASTER_BRANCH:"