Additional commits have been omitted to prevent performance issues

I accessed this page https://gitlab.XXX.com/YYY/ZZZ/merge_requests/659/commits from my browser
to get the list of commits associated to this merge request 659. Unfortunately the list gets truncated.
Because of the following message “additional commits have been omitted to prevent performance issues.
at the bottom of the web page.

How to avoid such a limitation ? How to prevent the list from being truncated… Regardless of performances.