Use a different way to push results in eval workflow

.github/workflows/evaluate.yaml

@@ -56,10 +56,13 @@ jobs:
               body: "Starting evaluation! Check the Actions tab for progress, or wait for a comment with the results."
             })
 
-      - name: Checkout pull request 🏁
+      - name: Checkout pull request
         uses: actions/checkout@v4
-        with:
-          ref: refs/pull/${{ github.event.issue.number }}/head
+
+      - name: Checkout Pull Request
+        run: hub pr checkout ${{ github.event.issue.number }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install pgvector
         run: |
@@ -193,25 +196,11 @@ jobs:
               body: `${summary}\n\n[Check the workflow run for more details](${actionsUrl}).`
             })
 
-      - name: Get PR branch name
-        id: get_pr_branch
-        uses: actions/github-script@v7
-        with:
-          script: |
-            const prNumber = context.issue.number;
-            const { data: pr } = await github.pulls.get({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              pull_number: prNumber
-            });
-            return { branch: pr.head.ref };
-
       - name: Commit and push eval results
         if: ${{ success() }}
         run: |
           git config --global user.name "github-actions[bot]"
           git config --global user.email "github-actions[bot]@users.noreply.github.com"
-          git checkout -b temp-branch
           git add evals/results/pr${{ github.event.issue.number }}
           git commit -m "Add evaluation results for PR #${{ github.event.issue.number }}"
-          git push origin temp-branch:${{ steps.get_pr_branch.outputs.branch }}
+          git push