I was never in the army, but in my childhood in the U.S. during World War II we learned

Reveille:
You gotta get up, you gotta get up,
You gotta get up in the morning.
But at West Point, according to Mark Twain, the traditional words were "You can't get 'em up" etc.

Mess call:
Come and get your beans, boys,
Come and get your beans.