It’s “O Green World” by Gorillaz — that’s the song identified as playing in the Digger teaser/trailer, including the electric-guitar outro people noticed.

Why this is the match

A post from the music creator specifically says their custom outro of “O Green World” was used in the Digger teaser.

Extra context

  • Fans on Reddit also pointed to “O Green World” as the trailer song.
  • The trailer itself is for Digger and was posted in June 2026.

If you were hearing the ending riff

The “electric guitar at the end” is likely part of the trailer edit of that same track rather than a separate song.

TL;DR: “O Green World” — Gorillaz.