$ git clone -n https://src.fedoraproject.org/rpms/gimagereader.git /var/lib/mock/f41-build-1020935-18021/root/chroot_tmpdir/scmroot/gimagereader
Cloning into '/var/lib/mock/f41-build-1020935-18021/root/chroot_tmpdir/scmroot/gimagereader'...
$ git fetch origin 8bd953f46b7cdb14e1db72cea4f5b426f9e184d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gimagereader
 * [new ref]         8bd953f46b7cdb14e1db72cea4f5b426f9e184d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8bd953f Add 0001-Work-around-enchant_get_prefix_dir-which-is-not-avai.patch