head-ref?

.github/workflows/build-engines.yml

@@ -305,7 +305,7 @@ jobs:
         with:
           repository: prisma/engines-wrapper
           event-type: publish-engines
-          client-payload: '{ "commit": "${{ github.sha }}", "branch": "${{ github.ref_name }}" }'
+          client-payload: '{ "commit": "${{ github.sha }}", "branch": "${{ github.head_ref || github.ref_name }}" }'
           token: ${{ secrets.PRISMA_BOT_TOKEN }}
       - name: Cleanup local directories
         run: rm -rf engines-artifacts engines-artifacts-for-r2 engines-artifacts-for-s3