diff --git a/.github/workflows/commit-check.yml b/.github/workflows/commit-check.yml
index 01ee50a..7971a30 100644
--- a/.github/workflows/commit-check.yml
+++ b/.github/workflows/commit-check.yml
@@ -14,7 +14,6 @@ jobs:
     steps:
       - uses: actions/checkout@v5
         with:
-          ref: ${{ github.event.pull_request.head.ref }}  # Checkout PR branch
           fetch-depth: 0  # Required for merge-base checks
       - uses: ./ # self test
         env:
diff --git a/README.md b/README.md
index 437e584..530b4c9 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,6 @@ jobs:
     steps:
       - uses: actions/checkout@v5
         with:
-          ref: ${{ github.event.pull_request.head.ref }}  # Checkout PR branch
           fetch-depth: 0  # Required for merge-base checks
       - uses: commit-check/commit-check-action@v2
         env: