Males will have a scrap and then make up and forget it, females with just wait until the next opportunity to get the other one again. I have never known females go back to being friendly with each other after they have started fighting.
One word of advice, definitely do not shout and yell, it is the worst thing you can do, as it excites them and makes them more keen to attack, try to stay calm and if you can get hold of one and go through a doorway, closing the door (gently) on them then trying to shut the door with one either side. I had a collie and a gsd bitch who had a couple of nasty scraps, and they were always waiting for each other after that. Eventually I had to rehome the gsd (she was a rescue and last one in) after she jumped out of a car window open about 8 inches onto the back of the collie.
Chucking water over them can sometimes make them come apart, but what happens then is that one or other of them gets a better hold than they had before, as they will not let go once they get a hold, and often haven't got a very good grip in the first place.
Sad to say I think you will have to rehome one, and it is better to think about this now that wait until one of them is badly injured or you get badly bitten, as they do not stop to think about anyone or anything.