stash/.guix-channel/channel.scm

(channel
  (version 0)
  (url "https://codeberg.org/glenneth/stash")
  (name 'stash)
  (introduction
   (make-channel-introduction
    "40-character-hex-string"  ; We'll generate this
    (openpgp-fingerprint
     "40-character-hex-string"))))