Short of performing a miracle, I think that this is one of those things that the alchemists of yore have sought to perform for centuries. Much like turning lead into gold.
The one thing that does fall just Angstroms short of a miracle is using a particle accelerator to actually change the atomic structure of water to that of extremely simple methanol. I'd use some deuterium for that maybe. And a couple trillion dollars.
But as for turning water into an alcohol, you'd have to, as previously mentioned, use it as a reagent. Adding sodium ethoxide would form ethanol, or you could run an acid-catalyzed hydrating reaction. And to actually convert the water into wine, you'd have to know how to add all the other molecules that give wine its distinct flavor.