$ git clone -n https://src.fedoraproject.org/rpms/retro-gtk.git /var/lib/mock/f41-build-1764243-24713/root/chroot_tmpdir/scmroot/retro-gtk
Cloning into '/var/lib/mock/f41-build-1764243-24713/root/chroot_tmpdir/scmroot/retro-gtk'...
$ git fetch origin 8271d4c3ebda00bdf13f92fd50637723295330a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/retro-gtk
 * [new ref]         8271d4c3ebda00bdf13f92fd50637723295330a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8271d4c No longer needed due GNOME-Games abandonware