It's not uncommon for new Hellcats to sometimes have loose fittings, unfortunately. I personally haven't seen the fuel line leak like this, as most people seem to end up with bad oil cooler lines/fittings. But it's all the same, in that lack of attention to detail and poor quality control sometimes results not all the whatsits and doodads being tightened properly.
Whenever I get a new car, regardless of the manufacturer, I'll put it in my garage for a day and just go through and tighten all the important fittings to the proper torque spec. I had a 2015 5.0 that was delivered with the driver side valve cover having 3 bolts that could be hand tightened.