In Command.php line 166:

  The command "/home/betawiki/config/bin/clupdate-git-repo 'https://gerrit.wi 
  kimedia.org/r/labs/tools/Isa' '/resources/projects/wikimedia-tools/isa' 'ma 
  ster' 'origin/master' 'wikimedia-gerrit'" failed.                           

  Exit Code: 128(Invalid exit argument)                                       

  Working directory: /resources/projects                                       

  Output:                                                                     
  ================                                                             


  Error Output:                                                               
  ================                                                             
  fatal: ambiguous argument 'origin/master': unknown revision or path not in   
  the working tree.                                                           
  Use '--' to separate paths from revisions, like this:                       
  'git <command> [<revision>...] -- [<file>...]'                               


update [--variant VARIANT] [--filter FILTER] [--] <project>