$ git clone -n https://gitee.com/opencloudos-stream/rednotebook.git /var/lib/mock/dist-oc9-epol-build-85231-57452/root/chroot_tmpdir/scmroot/rednotebook
Cloning into '/var/lib/mock/dist-oc9-epol-build-85231-57452/root/chroot_tmpdir/scmroot/rednotebook'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rednotebook
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7cc6f7c update