$ git clone -n https://gitee.com/opencloudos-stream/Rex /var/lib/mock/dist-ocs23-epol9-build-263480-25347/root/chroot_tmpdir/scmroot/Rex
Cloning into '/var/lib/mock/dist-ocs23-epol9-build-263480-25347/root/chroot_tmpdir/scmroot/Rex'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/Rex
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be14ae9 update