$ git clone -n https://gitee.com/wency_cn/graphite2.git /var/lib/mock/dist-an23-build-492208-74553/root/chroot_tmpdir/scmroot/graphite2
Cloning into '/var/lib/mock/dist-an23-build-492208-74553/root/chroot_tmpdir/scmroot/graphite2'...
$ git fetch origin 91bd776e509bec85d854a41f8ec74cbee93394e9:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/graphite2
 * [new ref]         91bd776e509bec85d854a41f8ec74cbee93394e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91bd776 Update code from upstream