Uncertain Glory

Jean Picard is a criminal who is about to be executed, but an air raid interrupts it and allows him to escape. Inspector Bonet brings him back. But along the way, they hear that a railway bridge vital to the Germans has been destroyed. The Germans take 100 Frenchmen and are threatening to execute them unless the saboteurs come forward. Picard who would rather die at the hands of the firing squad as oppose to the guillotine, offers to go to the Germans and say that he is the saboteur (imdb)