$ go get github.com/genuinetools/ghb0t

$ ghb0t -h
ghb0t -  A GitHub Bot to automatically delete your fork's branches after a pull request has been merged.
Usage: ghb0t <command>
Flags:
  -d         enable debug logging (default: false)
  -interval  check interval (ex. 5ms, 10s, 1m, 3h) (default: 30s)
  -token     GitHub API token (or env var GITHUB_TOKEN) 
  -url       Connect to a specific GitHub server, provide full API URL (ex. https://github.example.com/api/v3/) (default: <none>)
Commands:
  version  Show the version information.