$ git clone -n https://gitee.com/opencloudos-stream/opencv.git /var/lib/mock/dist-oc9-epol-build-73764-49065/root/chroot_tmpdir/scmroot/opencv
Cloning into '/var/lib/mock/dist-oc9-epol-build-73764-49065/root/chroot_tmpdir/scmroot/opencv'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/opencv
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7caeecd !12 [I9OJY5]:Rebuild for ffmpeg in opencloudos-stream Merge pull request !12 from ocs-bot/master