$ git clone -n https://src.fedoraproject.org/rpms/slick-greeter.git /var/lib/mock/f41-build-846657-163162/root/chroot_tmpdir/scmroot/slick-greeter
Cloning into '/var/lib/mock/f41-build-846657-163162/root/chroot_tmpdir/scmroot/slick-greeter'...
$ git fetch origin d2c3593221f7ea61f568df38cf3c5629c1d1a751:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/slick-greeter
 * [new ref]         d2c3593221f7ea61f568df38cf3c5629c1d1a751 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2c3593 Update to 2.0.6