$ git clone -n https://src.fedoraproject.org/rpms/seafile-client.git /var/lib/mock/f42-build-3364878-45045/root/chroot_tmpdir/scmroot/seafile-client
Cloning into '/var/lib/mock/f42-build-3364878-45045/root/chroot_tmpdir/scmroot/seafile-client'...
$ git fetch origin c6f46d3cb927a924f2986129b6177077de1e7ce8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/seafile-client
 * [new ref]         c6f46d3cb927a924f2986129b6177077de1e7ce8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6f46d3 Update to 9.0.12