$ git clone -n https://src.fedoraproject.org/rpms/xfe.git /var/lib/mock/f42-build-side-1-3540025-46572/root/chroot_tmpdir/scmroot/xfe
Cloning into '/var/lib/mock/f42-build-side-1-3540025-46572/root/chroot_tmpdir/scmroot/xfe'...
$ git fetch origin eb2860409bba18ba6ce595c4be350475f54caf53:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfe
 * [new ref]         eb2860409bba18ba6ce595c4be350475f54caf53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb28604 2.1.1