anchor.diff:  
   echo Clone master repository to mirror directory
   git clone --mirror %masterRepoUrl% %mirrorDirName%
  -if %ERRORLEVEL% > 0 (
  -  GOTO :ERROR
  -)
  +IF NOT %ERRORLEVEL%  0 GOTO ERROR
   
   cd %mirrorDirName%
   
  
positive.code: 
  IF "%1" == "" (
    echo Master repository URL is not provided
    GOTO :USAGE
  )
  
  IF "%2" == "" (
    echo Mirror repository URL is not provided
    GOTO :USAGE
  )
  
  SET masterRepoUrl=%1
  
negative.code: 
  echo Fetch and prune refs from master repository
  git fetch -p origin
  IF NOT %ERRORLEVEL%  0 GOTO ERROR
  
  echo Push to the mirror repository
  git push --mirror
  IF NOT %ERRORLEVEL%  0 GOTO ERROR
  
  echo Delete local mirror directory
  cd ..
  