I need to know. I AM DYING TO KNOW.

What is that song that Craig sings whenever there is some sort of duel situation between swordsmen. He sings it during Dark Souls and For Honor few times and I am dying to know what he is referencing. To be a bit clearer I am going to attempt to type out the tune, "Duh duh duh duh duh duh duh, brrrrrring brrrrrring"... Thanks, G1s