$ git clone -n https://gitee.com/wency_cn/libdvdread.git /var/lib/mock/dist-an23-build-502312-74802/root/chroot_tmpdir/scmroot/libdvdread
Cloning into '/var/lib/mock/dist-an23-build-502312-74802/root/chroot_tmpdir/scmroot/libdvdread'...
$ git fetch origin 9ac986e51dc5f1f4f1fd478a143d8bc9b4fdd347:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/libdvdread
 * [new ref]         9ac986e51dc5f1f4f1fd478a143d8bc9b4fdd347 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ac986e Update code from upstream