If you’re not perusing Instagram on a daily basis, you’re probably unaware that John Mayer unveiled a new, uh, hairstyle towards the end of Dead & Company’s tour. He calls it “Autumn Sunrise” and it’s, well, see for yourself. While Mayer was pondering aloud what exactly to do with himself post-Dead & Company tour, Joe Russo expertly quipped that he could always do something with his hair. In a…