class Bundler::Source::Git::GitCommandError

def initialize(command, path, extra_info = nil)
  @command = command
  msg = String.new
  msg << "Git error: command `#{command}` in directory #{path} has failed."
  msg << "\n#{extra_info}" if extra_info
  msg << "\nIf this error persists you could try removing the cache directory '#{path}'" if path.exist?
  super msg
end