David Wotherspoon's header gave Hibs a 1-0 victory at Easter Road to make it three wins out of three ahead of their showdown with Celtic at Hampden next Sunday.
The last time Fenlon's team lost was against their final opponents at the start of April.
The Irishman said: "We were looking for a performance and we got one of them. I was pleased to pick up three points, no injuries and a decent performance.
"We probably couldn't ask for any more. We spoke about that when we won the semi-final, to give ourselves momentum and confidence going into the final.
"The players have responded very well because it could have been easy to limp our way through to the final but we have had some decent performances along the way."
Wotherspoon did not even make the bench for last season's final defeat by Hearts and his goal has given him a chance of making up for that this season.
"It was a fantastic finish, a great ball from Lewis and a great header," Fenlon said. "I'm delighted for him because he has been up and down this season a little bit but he's a good lad and works very hard. I didn't think he could head a ball that well to be honest but it was a fantastic finish."