Support building a specific SHA on local branch as well

See gh-44204

Author: philwebb

.github/workflows/deploy-docs.yml

@@ -27,7 +27,9 @@ jobs:
           fetch-depth: 0
       - name: Rest Build Reference to SHA
         if: ${{ github.event.inputs.build-refname != '' && github.event.inputs.build-sha != '' }}
-        run: git update-ref refs/remotes/origin/${{ github.event.inputs.build-refname }} ${{ github.event.inputs.build-sha }}
+        run: |
+          git update-ref refs/remotes/origin/${{ github.event.inputs.build-refname }} ${{ github.event.inputs.build-sha }}
+          git update-ref refs/heads/${{ github.event.inputs.build-refname }} ${{ github.event.inputs.build-sha }}
       - name: Fetch Main Branch
         run: git fetch origin ${{ github.event.repository.default_branch }}:main
       - name: Set Up Node