diff --git a/action.yml b/action.yml
index 31eb481..62cdb31 100644
--- a/action.yml
+++ b/action.yml
@@ -32,7 +32,7 @@ runs:
     - name: Checkout code
       run: |
         git clone ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}.git ${GITHUB_WORKSPACE}
-        git checkout ${GITHUB_REF_NAME}
+        git checkout ${GITHUB_SHA}
         export SPECFILE=$(find . -type f -name "*.spec")
         echo "SPECFILE=${SPECFILE}" > .env
         echo "LC_ALL=C" >> .env