What is the best way to rename a project?

[caer]

You should just care about the names of the files KiCad knows about :

• the .pro file
• the top level .sch file, it must be named like the .pro
• make sure that it you rename hierarchical sheet files you also change their symbols in their parent sheet
• the .kicad_pcb file, it must be named like the .pro
• your libraries shouldn’t change names if you don’t want to change each component

This might also interest you:

Putting Project Files on GitHub

Hi guys, I wanted to share my very first KiCad project on GitHub. I used to use Diptrace and as their format are not friendly for version system, so I usually append the revision to the each of the files (PCB and schematic like BoardA-1R00.dch and BoardA-1R00.dip). So, moving onto KiCad, that practice of appending the version number stuck with me! I only realize them when I start thinking about putting them into KiCad. So, my files would look like BoardA-1R00.pro, BoardA-1R00.sch, BoardA-1R00…

Before comitting anything, it is very useful to add a .gitignore template:

KiCad.gitignore