class Gem::Resolver::GitSet

def prefetch(reqs)
  return unless @specs.empty?
  @repositories.each do |name, (repository, reference)|
    source = Gem::Source::Git.new name, repository, reference
    source.root_dir = @root_dir
    source.remote = @remote
    source.specs.each do |spec|
      git_spec = Gem::Resolver::GitSpecification.new self, spec, source
      @specs[spec.name] = git_spec
    end
  end
end