$ git clone -n https://gitee.com/opencloudos-stream/nde-backgrounds.git /var/lib/mock/dist-oc9-epol-build-68555-47002/root/chroot_tmpdir/scmroot/nde-backgrounds
Cloning into '/var/lib/mock/dist-oc9-epol-build-68555-47002/root/chroot_tmpdir/scmroot/nde-backgrounds'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/nde-backgrounds
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd9f147 !2 修复%post 报错 Merge pull request !2 from jeremiazhao/master