$ git clone -n https://src.fedoraproject.org/rpms/rpmgrill.git /var/lib/mock/f38-build-side-42-init-devel-928659-28746/root/chroot_tmpdir/scmroot/rpmgrill
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-928659-28746/root/chroot_tmpdir/scmroot/rpmgrill'...
$ git fetch origin 3449bdaac286077311944e0dd09083b3bf8e9613:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpmgrill
 * [new ref]         3449bdaac286077311944e0dd09083b3bf8e9613 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3449bda Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild