How to get the unclean CSS after gulp-uncss -

i know can clean css using gulp-uncss so:

var gulp = require('gulp'); var uncss = require('gulp-uncss'); var rename = require('gulp-rename');  gulp.task('clean-my-css', function() {     return gulp.src('original.css')         .pipe(uncss({             html: ['http://mywebsite.com']         }))         .pipe(rename('clean.css'))         .pipe(gulp.dest('./fresh')); }); 

and run task so:

gulp clean-my-css 

however, i'd unclean css well. in other words, if concatenated these 2 files (clean , unclean) have original.css:

clean.css + unclean.css = original.css

is possible gulp-uncss or other tool?