How to use the github/util.log function in github

GitHub.prototype.createRepo = function (repo) {
  if (this.createdRepos[repo]) return this.createdRepos[repo];
  var def = Q.defer();
  var self = this;
  var oldLog = require('github/util').log;
  require('github/util').log = function () {};
  function create() {
    return Q.nfcall(self.client.repos.createFromOrg, {
      org: self.settings.organisation,
      name: repo,
      auto_init: true,
      team_id: self.settings.team
    })
    .fail(function (err) {
      if (err && !(err.message && /already exists/.test(err.message))) {
        throw err;
      }
    });
  }
  return this.createdRepos[repo] = retry(create, 5)
    .then(function () {

.then(function () {
      require('github/util').log = oldLog;
    }, function (err) {
      require('github/util').log = oldLog;

var TOKEN = ''

var Readable = require('stream').Readable || require('readable-stream').Readable
var Transform = require('stream').Transform || require('readable-stream').Transform
var Writable = require('stream').Writable || require('readable-stream').Writable
var util = require('util')
var path = require('path')
var join = path.join
var relative = path.relative
var fs = require('fs')

var rimraf = require('rimraf')
var gethub = require('gethub')
var Client = require('github')
require('github/util').log = function () {}
var mongojs = require('mongojs')

var fix = require('../')
require('./fix-json')

var processed = join(__dirname, '..', 'processed')
try { fs.mkdirSync(processed) } catch (ex) { if (ex.code != 'EEXIST') throw ex }
var temp = join(__dirname, '..', 'temp')
try { fs.mkdirSync(temp) } catch (ex) { if (ex.code != 'EEXIST') throw ex }

var client = new Client({version: '3.0.0', debug: false});
client.authenticate({
  type: 'oauth',
  token: TOKEN
})

var join = require('path').join;
var fs = require('fs');
var transform = require('transform-stream');
var GitHub = new require('github');
var spawn = require('win-spawn');

require('github/util').log = function () {};

var cloneCMD = 'git clone git@github.com:[user]/[repo].git';

exports.outputToDir = outputToDir;
function outputToDir(dir, github) {
  try {
    fs.mkdirSync(dir);
  } catch (ex) {
    if (ex.code !== 'EEXIST') throw ex;
  }
  var folders = [];
  var modified = {};
  var pendingFolders = {};
  return transform(function (item, finish) {
    var date = normaliseDate(item.header.date);
    if (pendingFolders[date] === true) {