Create a Python program to reverse a given stack without recursion.
stack = [1, 2, 3]
def reverse_stack(stack):
    rev_stack = []

    while(stack):
        rev_stack.append(stack.pop())

    return rev_stack

# Usage
stack = [1, 2, 3]
print(reverse_stack(stack)) # => [3, 2, 1]