$ git clone -n https://src.fedoraproject.org/rpms/gnome-control-center.git /var/lib/mock/f40-build-2196821-51605/root/chroot_tmpdir/scmroot/gnome-control-center
Cloning into '/var/lib/mock/f40-build-2196821-51605/root/chroot_tmpdir/scmroot/gnome-control-center'...
$ git fetch origin 7ef504e30b6bcb8bcbaa0f28e5b93818e24f3ff0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-control-center
 * [new ref]         7ef504e30b6bcb8bcbaa0f28e5b93818e24f3ff0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ef504e Update to 45.2