Hey there Jakub,
I don't include any dependency on clojure as I want to keep the plugin clojure-version agnostic, makes it more flexible in the long run.
For your problem - you could add a <profile> to your ~/.m2/settings.xml which declares the plugin, and a clojure dependency outside of your projects, then invoke maven like:
mvn -Pjakubsclojureprofile clojure:repl
Hope this helps...