$ git clone -n https://src.fedoraproject.org/rpms/python-niaclass.git /var/lib/mock/f38-build-side-42-init-devel-620276-26339/root/chroot_tmpdir/scmroot/python-niaclass
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-620276-26339/root/chroot_tmpdir/scmroot/python-niaclass'...
$ git fetch origin b6b9f7a30d0a4d8be4ba47de2be84e37bf6dce58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-niaclass
 * [new ref]         b6b9f7a30d0a4d8be4ba47de2be84e37bf6dce58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6b9f7a Update to 0.1.4