(I’m Not Your) Steppin’ Stone, by The Monkees.
I literally can’t even. This is popped into my head — well — I was in the mood to angrily mash out some punk anthem, looked at Sex Pistols options, saw this song, got confused because I remembered them doing it but also remembered Minor Threat did it, came to understand they both did it, and learned the original (well, actually, no, but the 1960s hit version, at least) was by The Monkees, who, no, are not punk rock.
Further disambiguation: Hendrix plays a completely different song called Stepping Stone.
300. Three. Hundred.