Are you sure it's not the arm/pivot mechanism thingummy at the clutch end that hasn't seized through lack of use? Or even at the pedal end? (seems less likely)
Maybe someone put a block of wood under the pedals to stop them being pressed whilst working on the brakes, etc?
1996 Portofino 20vt & 2000 Pearl White Plus
1985½ & 2016 2017 Fiat 124 Spider + XF Sportbrake