Unable to push git notes with unsigned commits push rule

Steps to reproduce

  1. Enable the push rule Reject unsigned commits in the project setting
  2. Add a Git note for a specific commit git notes add -m 'this is a test note' 72a144e2
  3. Try to push the note git push origin refs/notes/commits
  4. Gitlab raising error remote: GitLab: Commit must be signed with a GPG key

What is the current bug behavior?

Git notes are considered as git commits.

What is the expected correct behavior?

Git notes should not be treated like Git commits. The GPG signing hook should not apply to them.

Job Relevant logs

remote: GitLab: Commit must be signed with a GPG key
To gitlab.xx.com:group/project.git
! [remote rejected] refs/notes/commits -> refs/notes/commits (pre-receive hook declined)

Customer ticket: https://gitlab.zendesk.com/agent/tickets/149489 (internal use)