Rename class usages after pull from upstream

Hallo 

I'm working on fork of one project.

I pull changes from upstream. One of changes is class rename (example: rename from class String to class Strings)

I use this class in files that exist only in this fork. (example: $var = new String())

After pull I have undefinied class. I have to manualy change name of every occurrence

Is there any possibilty to automaticly rename usages of renamed class or maybe just do code inspecion of undefinied class after pull from upstream?

Regards

Mateusz