The Easter Road outfit were as shocking as the Irn-Bru First Division Bairns were impressive in the first 45 minutes at the National Stadium, leaving Fenlon's men to trudge off at the break to a chorus of boos from their raging supporters.
But despite trailing to goals from Craig Sibbald, Jay Fulton and Blair Alston, Hibs stormed back to claim a second successive cup final slot.
And 25-goal frontman Griffiths - who netted twice, including the spectacular winner with a spot-kick shoot-out looming - says it was a few honest truths from Fenlon which shook the sluggish Clydesdale Bank Premier League side into their stunning response.
He said: "We were shocking in the first half but in the second, we managed to pick ourselves up and get the early goal before thankfully winning it in the end.
"When we came in at half-time the manager went through us and gave us a rollicking. He asked us how much did we want it? Did we want to keep our season alive?
"The manager gave us some strong words at half-time. But it wasn't just him who was voicing their opinions. James McPake and Kevin Thomson had their say too.
"That gave us the kick up the backside that we needed and we went out and showed how much we wanted to win the cup."