$ git clone -n https://gitee.com/opencloudos-stream/rust-cxx-build.git /var/lib/mock/dist-ocs23-epol9-build-201306-14487/root/chroot_tmpdir/scmroot/rust-cxx-build
Cloning into '/var/lib/mock/dist-ocs23-epol9-build-201306-14487/root/chroot_tmpdir/scmroot/rust-cxx-build'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/rust-cxx-build
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30c8245 update