$ git clone -n https://gitee.com/src-opencloudos-rpms/tree-pkg.git /var/lib/mock/dist-oc9-build-62834-16463/root/chroot_tmpdir/scmroot/tree-pkg
Cloning into '/var/lib/mock/dist-oc9-build-62834-16463/root/chroot_tmpdir/scmroot/tree-pkg'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/tree-pkg
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5aabde8 import tree-pkg-2.0.2-4.tl4