$ git clone -n https://gitee.com/src-opencloudos-rpms/cjson.git /var/lib/mock/dist-oc9-epol-build-53409-14768/root/chroot_tmpdir/scmroot/cjson
Cloning into '/var/lib/mock/dist-oc9-epol-build-53409-14768/root/chroot_tmpdir/scmroot/cjson'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/cjson
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3d92a9e import cjson-1.7.15-2.tl4