$ git clone -n https://gitee.com/wency_cn/mpich.git /var/lib/mock/dist-an23-build-492750-74562/root/chroot_tmpdir/scmroot/mpich
Cloning into '/var/lib/mock/dist-an23-build-492750-74562/root/chroot_tmpdir/scmroot/mpich'...
$ git fetch origin 9b1c383121cfc93d4be586d9a8858e495713658f:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/mpich
 * [new ref]         9b1c383121cfc93d4be586d9a8858e495713658f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b1c383 Update code from upstream