$ git clone -n https://src.fedoraproject.org/rpms/clang11.git /var/lib/mock/f38-build-side-42-init-devel-566276-25898/root/chroot_tmpdir/scmroot/clang11
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-566276-25898/root/chroot_tmpdir/scmroot/clang11'...
$ git fetch origin e89dbda59cb5365f413092a9cf1d63939f87a9c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clang11
 * [new ref]         e89dbda59cb5365f413092a9cf1d63939f87a9c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e89dbda Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild