$ git clone -n https://gitee.com/opencloudos-stream/rgb.git /var/lib/mock/dist-oc9-epol-build-96019-59747/root/chroot_tmpdir/scmroot/rgb
Cloning into '/var/lib/mock/dist-oc9-epol-build-96019-59747/root/chroot_tmpdir/scmroot/rgb'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rgb
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4af9ea package init