$ git clone -n https://src.fedoraproject.org/rpms/seafile.git /var/lib/mock/f45-build-35791-699/root/chroot_tmpdir/scmroot/seafile
Cloning into '/var/lib/mock/f45-build-35791-699/root/chroot_tmpdir/scmroot/seafile'...
$ git fetch origin 979a620e0036ede12a4f0f4aad99b98e01e40df5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/seafile
 * [new ref]         979a620e0036ede12a4f0f4aad99b98e01e40df5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 979a620 Update to 9.0.20