$ git clone -n https://gitee.com/src-opencloudos-rpms/radvd.git /var/lib/mock/dist-oc9-build-71880-47602/root/chroot_tmpdir/scmroot/radvd
Cloning into '/var/lib/mock/dist-oc9-build-71880-47602/root/chroot_tmpdir/scmroot/radvd'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/radvd
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at facdd87 import radvd-2.19-4.tl4