class Repo
   def head
      Head.current(self)
   end
end

class Head < Ref
 # Get the HEAD revision of the repo.
 #   +repo+ is the Repo
 #   +options+ is a Hash of options
 #
 # Returns Grit::Head (baked)
 def self.current(repo, options = {})
   head = repo.git.fs_read('HEAD').chomp
   if /ref: refs\/heads\/(.*)/.match(head)
     self.new($1, repo.git.rev_parse(options, 'HEAD'))
   end
 end
end # Head