What are the correct permission for files under /var/opt/gitlab/git-data/repositories?

My git-data directory is shared with redmine in order to synchronise Ticket status. redmine is a user in group git here.

When investigation a problem it turned out that some REPO/config files had 600 permissions and others 644. So some repos were accessible by redmine and others not.

I guess that the default of the gitlab docker image changed over time.

Is there a recommendation for permissions?
Is there a ‘fix-permissions’ script?

 find /var/opt/gitlab/git-data/ -printf "%u %g %m %y \n" |sort|uniq -c
     23 git git 2700 d
      2 git git 2744 d
    103 git git 2750 d
    769 git git 2754 d
  11599 git git 2755 d
      1 git git 2770 d
      1 git git 2774 d
   3345 git git 2775 d
  13669 git git 444 f
      4 git git 464 f
    614 git git 600 f
   8754 git git 644 f
   1413 git git 664 f
      1 git git 700 d
   2275 git git 755 d
   4647 git git 755 f
    190 git git 774 d
     28 git git 775 d
     29 git git 775 f
    190 git git 777 l