I know I have discussed this with a few folks but here is a UNCC/pbs video of a NC chef that went to WV to find out what they really are and how they are made. The pepperoni roll part starts about 8:30 seconds and the festival is in the town I went to college.
https://video.unctv.org/video/american-as-hand-pie-fnovsc/
https://video.unctv.org/video/american-as-hand-pie-fnovsc/