Gruntjs how to pass parameters?

Is the original config, which handles the code from the src directory, you can perform the same processing on the directory src2 and place in build2. How to register in the config?
module.exports = function (grunt) {
 var saveLicense = require('uglify-save-license');
grunt.initConfig({
 clean : {
 build : {
 src : ['build']
},
},
 copy : {
 files : {
 cwd : 'src',
 src : '**/*',
 dest : 'build',
 expand : true
}
},
...
June 27th 19 at 15:06

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