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: git_set.rb
    path of file: ./repos/truffleruby/lib/mri/rubygems/resolver
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
##
# A GitSet represents gems that are sourced from git repositories.
#
# This is used for gem dependency file support.
#
# Example:
#
#   set = Gem::Resolver::GitSet.new
#   set.add_git_gem 'rake', 'git://example/rake.git', tag: 'rake-10.1.0'

class Gem::Resolver::GitSet < Gem::Resolver::Set
  ##

    
  def add_git_spec(name, version, repository, reference, submodules) # :nodoc:
    add_git_gem name, repository, reference, submodules

    source = Gem::Source::Git.new name, repository, reference
    source.root_dir = @root_dir

    spec = Gem::Specification.new do |s|
      s.name    = name
      s.version = version
    end

    git_spec = Gem::Resolver::GitSpecification.new self, spec, source

    @specs[spec.name] = git_spec

    git_spec
  end