diff --git a/.github/workflows/checksum.yaml b/.github/workflows/checksum.yaml
index dcca554..29c4265 100644
--- a/.github/workflows/checksum.yaml
+++ b/.github/workflows/checksum.yaml
@@ -37,6 +37,9 @@ jobs:
 
       - name: checkout local templates
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{ github.ref }}
 
       - name: remember changed package
         run: |