gh pr merge [<number> | <url> | <branch>] [flags]

      --auto            Automatically merge only after necessary requirements are met
  -b, --body text       Body text for the merge commit
  -d, --delete-branch   Delete the local and remote branch after merge
      --disable-auto    Disable auto-merge for this pull request
  -m, --merge           Merge the commits with the base branch
  -r, --rebase          Rebase the commits onto the base branch
  -s, --squash          Squash the commits into one commit and merge it into the base branch

      --help                     Show help for command
  -R, --repo [HOST/]OWNER/REPO   Select another repository using the [HOST/]OWNER/REPO format