The 32-year-old, snapped up on a free transfer in August, has yet to start for Doncaster this season but earned his new club a point with a superb 25-yard equaliser against Ipswich on Saturday and is still hoping to win back a place in the Bafana Bafana squad.
Fortune said: "I need to get on the field and show what I can do.
"It is my belief that if I play well this season that I could be picked."
The former Manchester United winger said of his first goal for Rovers: "I truthfully expected the shot to go into the stand. There was nothing to lose and I tried my luck, and for once it worked out."