I can't remember the original words. I think they are in Spanish.
I believe you are referring to “Guantanamera,” a Cuban song. A Guantanamera is a young woman from Guantnamo province in the far east of that island. It’s “Guantanamera, guajira, Guantanamera....” A guajira is a peasant. One of my good friends when I was stationed there also sang “one ton tomato” until we set him straight.