You're going to want a hoagie roll [1][2]. They are shaped like a baguette and have the same ingredients, but way softer, chewy-er and denser. It's a process with multiple rises, then it's baked in steam to keep it soft.
This [3] seems to get the details right, but I haven't tried it. Conshohocken is a suburb outside of Philly known for microbreweries and baking so it's legit if that's the source.
[1] https://en.wikipedia.org/wiki/Hoagie_roll
[2] https://www.youtube.com/watch?v=rR8oA5ACqPg
[3] https://www.thefreshloaf.com/node/21448/real-italian-hoagie-...