$ git clone -n https://gitee.com/src-opencloudos-rpms/tar /var/lib/mock/dist-oc8-build-57120-15241/root/chroot_tmpdir/scmroot/tar
Cloning into '/var/lib/mock/dist-oc8-build-57120-15241/root/chroot_tmpdir/scmroot/tar'...
$ git fetch origin oc8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tar
 * [new branch]      oc8        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c814b78 import tar-1.30-9.tl3