$ git clone -n https://gitee.com/src-opencloudos-rpms/tang.git /var/lib/mock/dist-oc9-build-121720-71750/root/chroot_tmpdir/scmroot/tang
Cloning into '/var/lib/mock/dist-oc9-build-121720-71750/root/chroot_tmpdir/scmroot/tang'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tang
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a49b0f import tang-14-4.tl4