$ git clone -n https://gitee.com/wenyuzifang/mpich.git /var/lib/mock/dist-an23-build-471919-74118/root/chroot_tmpdir/scmroot/mpich
Cloning into '/var/lib/mock/dist-an23-build-471919-74118/root/chroot_tmpdir/scmroot/mpich'...
$ git fetch origin accee9c160fd66d10ba2c1cb6f3e312d95f5db9f:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/mpich
 * [new ref]         accee9c160fd66d10ba2c1cb6f3e312d95f5db9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at accee9c Update code from upstream