hit or hammer as in what? in what sense?
Not sure if this is quite what you're looking for, but The Poltergeist by William Bolcom has a part where you have to play with your forearm...
the legendary "col pugno" in Prokofiev's 6th sonata.
Someone wrote a piece called 'piece for fists'
Where exactly is the "col pugno" section in the Prokofiev sonata?
Grainger's "Cakewalk Smasher" also called "In Dahomey"Here's a few directives from the score: LH hammered, (1234) bunched on each b-note, slide with fist on black keys, violently