$ git clone -n https://gitee.com/opencloudos-stream/nvidia-550.git /var/lib/mock/dist-oc9-epol-build-229106-81282/root/chroot_tmpdir/scmroot/nvidia-550
Cloning into '/var/lib/mock/dist-oc9-epol-build-229106-81282/root/chroot_tmpdir/scmroot/nvidia-550'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/nvidia-550
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b35a4d !1 update nvidia-550 Merge pull request !1 from yugozhang/master