$ git clone -n https://gitee.com/fundawang/ffmpeg.git /var/lib/mock/dist-an23-build-347814-70386/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/dist-an23-build-347814-70386/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin 6d6111f4710495efdf94c78d14290255f8d84ef2:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/ffmpeg
 * [new ref]         6d6111f4710495efdf94c78d14290255f8d84ef2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d6111f Cleanup spec