Branching / merging docs like in Git

[Johg_Ananda]

related:

How to link to a page in a doc that will persist in a copy?

I have a doc template where I link to another page in the doc. When I make a copy of the doc, the new doc’s link points back to the prior (which makes sense). Is there a way to pick apart the url to make it dynamically go to the new doc’s page?