Anyone know a way to show what a key sequence would do if you were in holy mode? Alternately, can any holy-mode users tell me what C-u C-c M-j is bound to by default? It's recommended by bbatsov at https://github.com/clojure-emacs/cider/issues/835, and I'm just trying to figure out what actual command he means.

C-c M-j is cider-jack-in if I recall correctly. I'm not sure that the prefix argument before that does.