get pr commits

pr.ql

query($pr_num: Int!)
{
  organization(login: "neomutt") {
    repository(name: "neomutt") {
      pullRequest(number: $pr_num) {
        commits(first: 10) {
          nodes {
            commit {
              oid
            }
          }
        }
        mergeCommit {
          oid
        }
      }
    }
  }
}