Copy file and its entire history

Question

Myself and another developer are developing an API accessed by other code. As we change the behaviours of the API to better suit our needs, we release additional versions of

Answer 1

Check out git subtree (also here). With that you must be able to split off part of the history with that one file. You can duplicate it too, if bot else using interactive rebase. Then you can merge it back, and have the duplicate.