$ git clone -n https://src.fedoraproject.org/rpms/kiwi.git /var/lib/mock/f41-build-850429-165391/root/chroot_tmpdir/scmroot/kiwi
Cloning into '/var/lib/mock/f41-build-850429-165391/root/chroot_tmpdir/scmroot/kiwi'...
$ git fetch origin 1f4aa56dd6c5092b0c6b33f7aee134f457d122f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kiwi
 * [new ref]         1f4aa56dd6c5092b0c6b33f7aee134f457d122f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f4aa56 Update to 10.1.12