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: ght_update_repo.rb
    path of file: ./repos/github-mirror/lib/ghtorrent/commands
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby

require 'g
    
  def prepare_options(options)
    options.banner <<-BANNER
Updates repo entries in MongoDB and MySQL with fresh data. Marks the project
as deleted if it cannot be accessed on GitHub.

#{command_name} owner repo

    BANNER
  end