$ git clone -n https://gitee.com/zhoujiajia111/ffmpeg.git /var/lib/mock/dist-an23-dde-build-429938-73007/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/dist-an23-dde-build-429938-73007/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin 214882a58c9ab4ea75e1eebeecae6f5d7576f558:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/ffmpeg
 * [new ref]         214882a58c9ab4ea75e1eebeecae6f5d7576f558 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 214882a update ffmpeg.spec.