o.rb

[1] pry(main)> class Hello
             |   def hello
             |     [__method__, __callee__]
             |   end  
             |   
             |   alias_method :new_hello, :hello
             | end  
=> Hello
[2] pry(main)> Hello.new.hello
=> [:hello, :hello]
[3] pry(main)> Hello.new.new_hello
=> [:hello, :new_hello]