diff --git a/.github/workflows/testBuild.yml b/.github/workflows/testBuild.yml
index da4225f0e4be..5de11ba40a59 100644
--- a/.github/workflows/testBuild.yml
+++ b/.github/workflows/testBuild.yml
@@ -54,8 +54,7 @@ jobs:
         id: getHeadRef
         run: |
           set -e
-          gh pr checkout ${{ github.event.inputs.PULL_REQUEST_NUMBER }}
-          echo "REF=$(git rev-parse HEAD)" >> "$GITHUB_OUTPUT"
+          echo "REF=$(gh pr view ${{ github.event.inputs.PULL_REQUEST_NUMBER }} --json headRefOid --jq '.headRefOid')" >> "$GITHUB_OUTPUT"
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}