Reproducible godot build process

[JonBoyleCoding]

I know #197 is about building godot, however I think this is better to separate out into it's own issue as it's a slightly different topic.

I'm looking into making a nix derivation (partly so I can learn nix moreso) of vpuppr just partly out of interest. As it requires a reproducible build, directly using your built godot binaries as your Readme suggests (https://github.com/virtual-puppet-project/godot-builds/releases/tag/latest) is not appropriate as if you update the latest release here it would break the reproducible build process (as it requires a sha256).

So I was wanting to confirm with you which build process of godot you believe to be most appropriate:

• https://github.com/virtual-puppet-project/vpuppr/wiki/1.-Building-the-Godot-Fork states a process to build your custom godot, however doesn't specify which version/tag of godot to use and as such I believe some of the patches are failing. I understand it's v3 rather than v4, but which version specifically would be necessary.
• [Bug]: Compiling from source errors #197 Suggests that your godot fork can be used (https://github.com/you-win/godot) - is this what you use to produce your binaries? Does this have patches already applied and should just use scons to build the engine?

Thanks for your thoughts.