Link untracked files

This is an option to link untracked files by git while still ignoring files that are git ignored. The motivation for this is that I have some dotfiles that are untracked by git since they contain private information but which I still want to link. 
Also, when I'm working on my emacs configuration I sometimes have new files that I don't want to track right away but there's no way to link them easily since they're inside a submodule.