"To be honest, I was just trying to get it onto the green and two putt," he said.
The 22-year-old Hojgaard, a Ryder Cup winner last month, opened with a bogey five but quickly got his game going and hit eight birdies to take the early clubhouse lead.
Norrman, 25, made a steady start before his first birdie on the sixth hole and went on to score another five in a blemish-free round.
Homa birdied three of his last five holes to shoot up the leaderboard and into a share of the overnight lead.
Defending champion Tommy Fleetwood, who has won the last two editions of the tournament, finished with a one-under 71.