_pygit2.GitError: reference 'refs/heads/master' not found

import pygit2
from github import Github

github_username = "user"
github_password = "password"
github_email = "email"

# login to github and
authenticated_github_user = Github(github_username, github_password)
user = authenticated_github_user.get_user()

is_org: bool = False
# create the new repository
if is_org:
    org = authenticated_github_user.get_organization('someorg')
    repo = org.create_repo('projectname', description='somedescription')
else:
    repo = user.create_repo('testrepo_github_api', description='this is a test')

# clone the repository
repoClone = pygit2.clone_repository(repo.git_url, '/tmp/test_clone')

#create some new files in the repo
repo.create_file("README.md", "init commit", 'readmeText')

# Commit it
repoClone.remotes.set_url("origin", repo.clone_url)
index = repoClone.index
index.add_all()
index.write()
author = pygit2.Signature("Jesus Christ", github_email)
commiter = pygit2.Signature("Jesus Christ", github_email)
tree = index.write_tree()
oid = repoClone.create_commit('refs/heads/master', author, commiter, "init commit", tree, [repoClone.head.get_object().hex])
remote = repoClone.remotes["origin"]
credentials = pygit2.UserPass(github_username, github_password)
remote.credentials = credentials

callbacks = pygit2.RemoteCallbacks(credentials=credentials)

remote.push(['refs/heads/master'], callbacks=callbacks)

This results in

  oid = repoClone.create_commit('HEAD', author, commiter, "init commit", tree, [repoClone.head.get_object().hex])
_pygit2.GitError: reference 'refs/heads/master' not found

git show-ref is empty, but this is pretty much expected, no?

This commit and push still go through, but the error is nevertheless thrown.

Am I doing something wrong?

Start with the reproduction around pygit2.clone_repository, repoClone.create_commit, and remote.push; inspect the empty git show-ref state and the reference passed to create_commit. Confirm why the commit and push appear to succeed despite the reported exception, then verify the same script completes without the error.