$ git clone -n https://gitee.com/wenyuzifang/mpich.git /var/lib/mock/dist-an23-build-469421-74027/root/chroot_tmpdir/scmroot/mpich
Cloning into '/var/lib/mock/dist-an23-build-469421-74027/root/chroot_tmpdir/scmroot/mpich'...
$ git fetch origin da9eafed1aebde56e7fb32f61fa8ab2750a3996f:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/mpich
 * [new ref]         da9eafed1aebde56e7fb32f61fa8ab2750a3996f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da9eafe Update code from upstream