Imps boss Danny Cowley expressed his delight for midfielder who scored his first goal in a City shirt since arriving on loan from Peterborough in January.
O'Hara's 69th minute header was the decisive goal as the Imps moved five points clear at the top of Sky Bet League Two on Friday night.
Danny explained how O’Hara deserved to find the back of the net as a reward for his impressive attitude: “We are pleased for him because he has an A star attitude.
“He has got infectious character and he was disappointed with himself in the last home game so he trained exceptionally well the next day.
“That is the type of kid he is and if you could bottle his attitude and work ethic then you will be a very rich man, we are pleased he found the goal tonight because it typifies him really, he is really brave and he managed to only have eyes for the ball.”
Speaking about tonight’s performance against a travelling Yeovil Town side, Cowley praised his players for their relentless efforts.
“I think we showed all the qualities which make us who we are. I thought we were resilient, durable and relentless,” said the Imps boss.
“We have had 35 box entries in the first half and we had some really good chances. They carried very little threat and we deserved to win on work ethic and energy alone.
“In the second half, we played into the wind so for the boys to play 60 minutes in one style and then play the way we did is a credit to the players for their experience and their tactical intelligence.”
Experienced goalkeeper Matt Gilks remained in net for City tonight and earnt the Imps their first clean sheet at home since the Lincolnshire Derby.
“It was important to keep a clean sheet here tonight because we haven’t kept enough of them at home,” explained Cowley.
“We have conceded some good goals here but the clean sheet was important for us tonight, we are on 79 points and one more away from meeting the total we reached last year.”
The City boss finished by complimenting his side’s work ethic by saying: “We work so hard on the training pitch and so hard in the video room that we can now go from one system to another almost seamlessly.
“The players totally understand what the trigger is and what we have to do to adapt, it is a credit to them and we are really proud of them.”