Fix build workflow for host mode runner

Clean up stale repo dir, add safe.directory for git as root,
and chown repo to builder before makepkg.

.gitea/workflows/build-and-publish.yaml

@@ -16,9 +16,10 @@ jobs:
     steps:
       - name: Build and publish changed packages
         run: |
+          rm -rf repo
           git clone http://gitea:3000/nevaforget/moonarch-pkgbuilds.git repo
-          chown -R builder:builder repo
           cd repo
+          git config --global --add safe.directory "$(pwd)"
 
           CHANGED=$(git diff --name-only HEAD~1 HEAD | grep '/PKGBUILD$' | sed 's|/PKGBUILD||' || true)
 
@@ -29,6 +30,8 @@ jobs:
 
           echo "Changed packages: $CHANGED"
 
+          chown -R builder:builder .
+
           for pkg in $CHANGED; do
             echo "==> Building $pkg"
             cd "$pkg"