AUGUSTA, Ga. — Brooks Koepka stood on the first tee Sunday at Augusta National Golf Club, both a 3-wood and a lead before the final round of the Masters in his hands. He fidgeted and fumbled with them both. When the green-jacketed starter finally uttered the words that would begin Koepka’s coronation — “Fore, please. Now driving: Brooks Koepka.” — he unleashed that 3-wood so far left that it nearly bisected the fairway — the ninth fairway.