Like a turtle neck or a foreskin, it folds back on itself.
ETA it doesn't really need 'reserve'. As the clutch wears the fingers push the throwout back.
The reservoir only has to hold the slack.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.