$ git clone -n https://gitee.com/src-opencloudos-rpms/plexus-classworlds.git /var/lib/mock/dist-oc9-build-59228-16463/root/chroot_tmpdir/scmroot/plexus-classworlds
Cloning into '/var/lib/mock/dist-oc9-build-59228-16463/root/chroot_tmpdir/scmroot/plexus-classworlds'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/plexus-classworlds
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6ecd671 import plexus-classworlds-2.6.0-6.tl4