The Borg assimilate Emacs packages as Git submodules.
Borg is a bare-bones package manager for Emacs packages. It provides
only a few essential features and should be combined with other tools
such as Magit,
Borg assimilates packages into the
~/.emacs.d repository as Git
submodules. An assimilated package is called a drone and a borg-based
~/.emacs.d repository is called a collective.
It is possible to clone a package repository without assimilating it. A cloned package is called a clone.
To learn more about this project, also read the blog post 1 in which it was announced.