question: public File makeDirty ( ) throws IOException { File f = File . createTempFile ( "dirty" , ".tmp" , repositoryLocation . getParentFile ( ) ) ; FileWriter fw = new FileWriter ( f ) ; fw . write ( "" + System . currentTimeMillis ( ) ) ; fw . flush ( ) ; fw . close ( ) ; return f ; }
target:  Creates a new file with dummy content inside the git repository to make it dirty.