ci: fix git head issue

Author: AREMA Ontology Bot

.github/workflows/pipeline.yaml

@@ -86,6 +86,7 @@ jobs:
       - name: 🧾 Checkout repository
         uses: actions/checkout@v4
         with:
+          ref: ${{ github.event.repository.default_branch }}
           fetch-depth: 0  # Full history for proper git operations
 
       - name: 📥 Download validated ontology
@@ -140,17 +141,14 @@ jobs:
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
           
-          # Pull latest changes to avoid race conditions
-          git pull --rebase origin ${{ github.ref_name }} || true
-          
           # Add both docs and the ontology file (updates src/ontology/)
           git add docs src/ontology/AREMA-ontology.ttl
           
           # Only commit if there are changes
           if ! git diff --cached --quiet; then
             RELEASE_TAG="${{ github.event.release.tag_name || inputs.release_tag || 'manual' }}"
             git commit -m "Update ontology and docs from release ${RELEASE_TAG} [skip ci]"
-            git push
+            git push origin ${{ github.event.repository.default_branch }}
             echo "✅ Documentation and ontology committed"
           else
             echo "ℹ️ No changes to commit"