Updateing redmine git repository / No redmine git update on branche

[toples]

Hi guys,
first I have to say that you have done an amazing job!

My configuration

Redmine version         4.0.3.stable
redmine_gitlab_hook	4.0.0
GitLab 			12.1.1 

I had to change the following line in
plugins/redmine_gitlab_hook/app/controllers/gitlab_hook_controller.rb
in order to sync the changes of my master branch from the gitlab repository to redmine ( I use ssh for pulling the changes ):

if Setting.plugin_redmine_gitlab_hook['all_branches'] == 'yes'
      # fetch --all didnt do anything :-(
      # command = git_command(prefix, "fetch --all#{prune}", repository)
      command = git_command(prefix, "pull", repository)

      logger.debug { "a) Command: #{command}, #{prefix}, #{repository}" }
      exec(command)

Now when I push changes from my local master branch to remote master branch ( even the refs # @ works ) I can see the changes in redmine (and they are the same as the ones in gitlab) So far me happy :-)

Now if I create an addition branch for ex. "bugs" and i push it from my local to the remote, I can see the branch in gitlab, but in redmineI only see the master branch ( the log file of redmine doenst show any activities, when I push on my second branch "bugs" ).

This is what I see in redmine terminal when I do an git branch -a

redmine@dev:~/redmine/git/p1$ git branch -a
* master
  remotes/origin/HEAD -> origin/master
  remotes/origin/bugs
  remotes/origin/feature
  remotes/origin/master

and yet redmine repository browser, shows me only the master.

Could you give me some input here, what should I do in this case?