No more issues when you develop themes and plugins and need to manage specific Field groups on different git repos.
I just released a new major version of my ACF Json Location Manager that helps users to maintain json location for field groups.
It is now easy to put json files in themes, plugins or even in any other user defined location so managing field groups in repos is easyer than never !
Just instantiate a class and select the right place in a new field group metabox and it will be enough.
Please have a try and do not hesitate to comment (please add issues in github)