$ git clone -n https://src.fedoraproject.org/forks/packit/rpms/image-builder.git /var/lib/mock/f41-build-58944781-6569367/root/chroot_tmpdir/scmroot/image-builder
Cloning into '/var/lib/mock/f41-build-58944781-6569367/root/chroot_tmpdir/scmroot/image-builder'...
$ git fetch origin a7704060d38b85ab10d749532057098bff9859da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/packit/rpms/image-builder
 * [new ref]         a7704060d38b85ab10d749532057098bff9859da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a770406 Update to 17 upstream release