.github/workflows: Fix each commit CI job

By fetching the full history and checking out the HEAD commit of the
branch we fix it and using the action parameters is also less code.

Broken since its introduction in c3e7dc3 (.github/workflows: Add job to
compile test each commit, 2023-12-22).

In addition we also need to pass --quit to git rebase as --abort resets
HEAD which we don't want.

Close #1968

.github/workflows/test-igor-rebase-exec-workflow.yml

@@ -74,18 +74,14 @@ jobs:
         uses: actions/checkout@v3
         with:
           submodules: recursive
+          fetch-depth: 0
+          ref: ${{ github.event.pull_request.head.sha }}
       - name: Initial repo config
         run: tools/initial-repo-config.sh
-      - name: Fetch latest changes for main
-        run: git fetch origin main
-      - name: Fetch latest changes of branch
-        run: git fetch origin $GITHUB_HEAD_REF
-      - name: Checking out branch
-        run: git checkout -B $GITHUB_HEAD_REF origin/$GITHUB_HEAD_REF
       - name: List of commits to operate on
         run: git log --pretty=ref origin/main..
       - name: Cleanup earlier rebase invocations
-        run: git rebase --abort 2>/dev/null || true
+        run: git rebase --quit 2>/dev/null || true
       - name: Compile check each commit with ${{ inputs.experiment }}
         run: |
              git rebase --exec "git log --pretty=ref -n1"                                                \