curl --request GET \
  --url https://api.example.com/orgs/{org_id}/nodes/{node_id}/pull-requests/{pr_number}

{
  "pr": {
    "id": "<string>",
    "node_id": "<string>",
    "number": 123,
    "title": "<string>",
    "source_branch": "<string>",
    "target_branch": "<string>",
    "source_commit": "<string>",
    "target_commit": "<string>",
    "status": "<string>",
    "is_draft": true,
    "author": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "description": "<string>",
    "author_email": "<string>",
    "merged_by": "<string>",
    "merged_by_email": "<string>",
    "closed_by": "<string>",
    "closed_by_email": "<string>",
    "merged_at": "2023-11-07T05:31:56Z",
    "closed_at": "2023-11-07T05:31:56Z",
    "can_merge": true,
    "merge_reason": "<string>",
    "commits_ahead": 123
  }
}