$ git clone -n https://gitee.com/opencloudos-stream/aggregate6.git /var/lib/mock/dist-oc9-epol-build-90244-58996/root/chroot_tmpdir/scmroot/aggregate6
Cloning into '/var/lib/mock/dist-oc9-epol-build-90244-58996/root/chroot_tmpdir/scmroot/aggregate6'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/aggregate6
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f9a005 update