Workflow

halp.html

I have a standalone git repo (which is on github) which contains my 'framework'. That framework is a 
load of php/css/js/less files, in several subdirectories. I use that framework in all of my projects.

I have another standalone git repo which contains all of my projects.

At the moment, if I update the framework, I then have to copy and paste it into all of my projects, 
overwriting the existing stuff in each project folder.

I know! The humanity. Think of the children. But we live in the 21st Century etc.

I'm pretty sure I'm "doing it wrong". (or, _doing_it_wrong() for those WP folk reading this). I suspect 
there's something with git submodules I can do.

Can anyone suggest anything I can read or look at to let me get my little head around this? If I sort 
this out, I'll happily write a blog post about it to help other folk out.

If you don't modify the framework files to create the "child theme", what about adding Git submodule outside of root then a hook (which is invoked when you update the submodule) which moves/copies the now updated files to their final location?