diff --git a/.github/workflows/nightly-build.yml b/.github/workflows/nightly-build.yml
index 7b4ef789..967d85cf 100644
--- a/.github/workflows/nightly-build.yml
+++ b/.github/workflows/nightly-build.yml
@@ -69,9 +69,7 @@ jobs:
 
           export GIT_BRANCH=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}
           echo "GIT_BRANCH=$GIT_BRANCH"
-          export GIT_REF=refs/heads/$GIT_BRANCH
-          echo "GIT_REF=$GIT_REF"
-          export GIT_REV=$(git rev-parse --short $GIT_REF)
+          export GIT_REV=$(git rev-parse --short "$GITHUB_SHA")
           echo "GIT_REV=$GIT_REV"
 
           python rebuild_meta_yaml.py \