$ git clone -n https://gitee.com/opencloudos-stream/grass /var/lib/mock/dist-ocs23-epol9-build-244629-23158/root/chroot_tmpdir/scmroot/grass
Cloning into '/var/lib/mock/dist-ocs23-epol9-build-244629-23158/root/chroot_tmpdir/scmroot/grass'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/grass
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28b632f update