$ git clone -n https://gitee.com/opencloudos-stream/ffmpeg.git /var/lib/mock/dist-ocs23-build-15178-1041/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/dist-ocs23-build-15178-1041/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ffmpeg
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30620b9 !1 Rebuilt for samba 4.18.4 Merge pull request !1 from cunshunxia/master