Raldeen

Hi my name is raldeen and I am having trouble with a banana pup can anyone help me.I am from Hawaii on the island of oahu.my neighbor has a banana tree growing g in his yard dwarf variety. Its small but gives him bananas there's one of his pups is growing in my side of the yard which grew under the fence and in my yard he says I can have it so my question is how do I divide it with the fence blocking it from the mother plant and how would I know if it has roots or not?