$ git clone -n https://gitee.com/opencloudos-stream/ffmpeg.git /var/lib/mock/dist-oc9-epol-build-215220-80836/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/dist-oc9-epol-build-215220-80836/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ffmpeg
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ecaf10 !30 enable harfbuzz for drawtext support Merge pull request !30 from cunshunxia/master