$ git clone -n https://gitee.com/zhoujiajia111/ffmpeg.git /var/lib/mock/dist-an23-epao-build-432133-73056/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/dist-an23-epao-build-432133-73056/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin b79d66010add9eeb605c850ed81571959b3813ad:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/ffmpeg
 * [new ref]         b79d66010add9eeb605c850ed81571959b3813ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b79d660 Rebuild for libtheora 1.2.0