Gitlab Runner MachineName not really used?

Hello in “/etc/gitlab-runner/config.toml” I have setup " MachineName = “GITLAB-RUNNER-%s”. When in our AWS environemnt new runner get started the have following names:

runner-51e4e52b-GITLAB-RUNNER-1535961601-d2e24b7b
runner-51e4e52b-GITLAB-RUNNER-1535961670-6d6bee30

It is possible to have named GITLAB-RUNNER-{NUMBER OR ID} ?

Greetings