include_clone.rb

module One
  def go
    1
  end
end

module Two
  def go
    2
  end
end

obj = Module.new

obj.extend One
obj.extend Two
call = 0
puts "call #{call+=1}: #{obj.go}"

obj.extend One.clone
puts "call #{call+=1}: #{obj.go}"

obj.extend Two.clone
puts "call #{call+=1}: #{obj.go}"