$ git clone -n https://gitee.com/zhoujiajia111/ffmpeg.git /var/lib/mock/dist-an23-dde-build-429957-73007/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/dist-an23-dde-build-429957-73007/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin e7d92509cc79f1f9943207367177be07b5d371fa:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/ffmpeg
 * [new ref]         e7d92509cc79f1f9943207367177be07b5d371fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7d9250 update ffmpeg.spec.