Is it possible to sign commits created with project access tokens?

Hello all

I have a simple job that creates a release commit on each push to the master branch:

        - git config --global $CI_EMAIL
        - git config --global $CI_NAME
        - <RELEASE>

ACCESS_TOKEN is a project access token made available to CI via CI/CD variables.

However, after enabling mandatory signing for commits the code above fails with the following:

remote: GitLab: Commit must be signed with a GPG key

The documentation mentions that each access token has a bot user associated with it. But I can’t find any information on how to sign commits created with an access token.

We are using self-hosted Gitlab installation v15.11.3.

Any help is appreciated.
Thanks, Sergey