Quickly switching between git status files buffers in Emacs

When I'm deep into developing a feature, I don't want to think about
whether a file is already open in a buffer, or if I need to search the
whole project to find it.

I just want to jump straight to the files I'm actively working on,
the ones that Git tells me are modified, untracked, or even
renamed.

Emacs already gives us great defaults for diffe...