There's another issue in there. Omnipotent/omniscient being. Knows all things...including the future, and can do anything. If such a being knows exactly how all things will play out from now to infinity, then that being by definition does not have free will, and as such is not, in fact, omnipotent. Its own actions are set in stone. And so are yours. In this case, your ascension to heaven or condemnation to hell is already determined. Whatever you do is what this being already knows you will do. There is no room for repentence unless the conditions of the world it has created dictate that you will, indeed, repent.
So under the omnipotent/omniscient being theory, we are all puppets of a puppet, inextricably locked in to our own respective dooms. Omniscience and omnipotence are mutually exclusive.