$ git clone -n https://gitee.com/zhoujiajia111/libtheora.git /var/lib/mock/dist-an23.3-build-429583-73027/root/chroot_tmpdir/scmroot/libtheora
Cloning into '/var/lib/mock/dist-an23.3-build-429583-73027/root/chroot_tmpdir/scmroot/libtheora'...
$ git fetch origin b0155ddbd2e3f3ceb496b53dcb4e855c4bdced6d:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/libtheora
 * [new ref]         b0155ddbd2e3f3ceb496b53dcb4e855c4bdced6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0155dd update libtheora.spec.