Hognose Snakes are rear fanged colubrids.
A rear fanged snake generally has to Bite and Hold/Chew in order to invenomate you. Normally, if they give a defensive bite, it is a quick bite and release. They will not generally hold on unless a feeding response is triggered.
A Front Fanged snake like a rattlesnake for instance, can invenomate with a single, quick bite and release.
Lastly, Hognose snakes are predomanently Frog/Toad eaters, and their venom has very little affect on large mammals like humans. The only problem I could see, if you actually managed to get hognose venom into your system, is if you happen to have an allergic reaction to it.
Myself, I was bit while feeding a large western hognose while I worked in a petshop a few years ago. Being that it bit me with the intent of feeding, it did hold on and I did get venom in my system. I felt a little light headed for about 15-20 minutes after that and that was about it. No other effects came of it.