$ git clone -n https://src.fedoraproject.org/rpms/gnome-control-center.git /var/lib/mock/f40-build-793206-138806/root/chroot_tmpdir/scmroot/gnome-control-center
Cloning into '/var/lib/mock/f40-build-793206-138806/root/chroot_tmpdir/scmroot/gnome-control-center'...
$ git fetch origin f25c8d772f80c63167a6c445204a62abe66d1a98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-control-center
 * [new ref]         f25c8d772f80c63167a6c445204a62abe66d1a98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f25c8d7 Update to 46~beta.2