Fix git tag checkout in Gitea Actions workflow

- For tags: fetch with explicit ref mapping to refs/tags/
- For branches: fetch with explicit ref mapping to refs/remotes/origin/
- Properly checkout tag refs using refs/tags/ path
- Fixes 'pathspec did not match any file(s)' error on tag builds

.gitea/workflows/release.yml

@@ -17,10 +17,14 @@ jobs:
           cd $GITHUB_WORKSPACE
           git init
           git remote add origin ${{ github.server_url }}/${{ github.repository }}.git
-          git fetch origin ${{ github.ref }}
+          
           if [[ "${{ github.ref }}" == refs/tags/* ]]; then
-            git checkout ${{ github.ref_name }}
+            # For tags, fetch the specific tag and checkout the commit it points to
+            git fetch origin ${{ github.ref }}:refs/tags/${{ github.ref_name }}
+            git checkout refs/tags/${{ github.ref_name }}
           else
+            # For branches, fetch and checkout with tracking
+            git fetch origin ${{ github.ref_name }}:refs/remotes/origin/${{ github.ref_name }}
             git checkout -b ${{ github.ref_name }} origin/${{ github.ref_name }}
           fi