$ git clone -n https://src.fedoraproject.org/rpms/gimagereader.git /var/lib/mock/f41-build-745380-13348/root/chroot_tmpdir/scmroot/gimagereader
Cloning into '/var/lib/mock/f41-build-745380-13348/root/chroot_tmpdir/scmroot/gimagereader'...
$ git fetch origin 42ca803ee3a6b7cf7e2334bbcf002d0a008cf155:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gimagereader
 * [new ref]         42ca803ee3a6b7cf7e2334bbcf002d0a008cf155 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 42ca803 Update to 3.4.2