$ git clone -n https://src.fedoraproject.org/rpms/SDL2_image.git /var/lib/mock/f40-build-800811-143637/root/chroot_tmpdir/scmroot/SDL2_image
Cloning into '/var/lib/mock/f40-build-800811-143637/root/chroot_tmpdir/scmroot/SDL2_image'...
$ git fetch origin d8197a02c7fd7bd7b4afc7e17e7cbfcd68afe721:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/SDL2_image
 * [new ref]         d8197a02c7fd7bd7b4afc7e17e7cbfcd68afe721 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d8197a0 Update changelog