$ git clone -n https://gitee.com/zhoujiajia111/ffmpeg.git /var/lib/mock/dist-an23-dde-build-429951-73007/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/dist-an23-dde-build-429951-73007/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin 9ed6510277fc07b2ea5b54d1a2a87129ba7ea900:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/ffmpeg
 * [new ref]         9ed6510277fc07b2ea5b54d1a2a87129ba7ea900 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ed6510 update ffmpeg.spec.