$ git clone -n https://gitee.com/zhoujiajia111/libtheora.git /var/lib/mock/dist-an23.3-build-429594-73027/root/chroot_tmpdir/scmroot/libtheora
Cloning into '/var/lib/mock/dist-an23.3-build-429594-73027/root/chroot_tmpdir/scmroot/libtheora'...
$ git fetch origin 4db30f50b98548cf74c2574cd0f557de9864d5cd:KOJI_FETCH_HEAD
From https://gitee.com/zhoujiajia111/libtheora
 * [new ref]         4db30f50b98548cf74c2574cd0f557de9864d5cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4db30f5 update libtheora.spec.