$ git clone -n https://src.fedoraproject.org/rpms/seafile-client.git /var/lib/mock/f42-build-side-110616-59043309-6570571/root/chroot_tmpdir/scmroot/seafile-client
Cloning into '/var/lib/mock/f42-build-side-110616-59043309-6570571/root/chroot_tmpdir/scmroot/seafile-client'...
$ git fetch origin 786c1b58647b9461669e96e51d5207eb9b046eed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/seafile-client
 * [new ref]         786c1b58647b9461669e96e51d5207eb9b046eed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 786c1b5 Update to 9.0.13