You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: refresh_pull_request_history.rb
    path of file: ./repos/github-mirror/fixes
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby

require 'ghtorrent'

class GHTRefreshPullReqHistory < MultiprocessQueueClient

  def clazz
    RefreshPullReqHistory
  end

end

class RefreshPullReqHistory

  include GHTorrent::Settings
  include GHTorrent::Retriever
  include GHTorrent::Persister
  include GHTorrent::APIClient

  def initialize(config, queue, options)
    @config = config
    @queue = queue
  end

  def logger
    @ght.logger
  end

  def persister
    @persister ||= connect(:mongo, settings)
    @persister
  end

  def settings
    @config
  end

  def validate
    super
    Trollop::die 'Three arguments required' unless args[2] && !args[2].empty?
  end
    
  def run(command)

    processor = Proc.new do |msg|

      owner, repo, pull_req = msg.split(/ /)

      @ght ||= GHTorrent::Mirror.new(settings)
      col = persister.get_underlying_connection[:pull_requests]

      retrieved = api_request("https://api.github.com/repos/#{owner}/#{repo}/pulls/#{pull_req}")

      if retrieved.nil?
        log.warn("Cannot retrieve #{owner}/#{repo} -> #{pull_req}")
        return
      end

      retrieved['owner'] = owner
      retrieved['repo'] = repo
      retrieved['number'] = pull_req.to_i

      col.delete_one({'owner' => owner, 'repo' => repo, 'number' => pull_req.to_i})
      col.insert_one(retrieved)

      @ght.db.from(:pull_request_history, :pull_requests, :users, :projects)\
                 .where(:pull_requests__id => :pull_request_history__pull_request_id)\
                 .where(:users__id => :projects__owner_id)\
                 .where(:projects__id => :pull_requests__base_repo_id)\
                 .where(:users__login => owner)\
                 .where(:projects__name => repo)\
                 .where(:pull_requests__pullreq_id => pull_req)\
                 .delete

      @ght.ensure_pull_request(owner, repo, pull_req,
                               comments = false, commits = false, history = true)
  end