$ git clone -n https://gitee.com/wency_cn/libvpx_1770761972.git /var/lib/mock/dist-an23-build-513328-75099/root/chroot_tmpdir/scmroot/libvpx_1770761972
Cloning into '/var/lib/mock/dist-an23-build-513328-75099/root/chroot_tmpdir/scmroot/libvpx_1770761972'...
$ git fetch origin c126f6c4488c571e954d25df0820bcb6076a49aa:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/libvpx_1770761972
 * [new ref]         c126f6c4488c571e954d25df0820bcb6076a49aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c126f6c Update code from upstream