What is the best way to port a test server to production using GULP?

Question

gulp.js

There is a test server. Wrote gulp-tasks.

1. Pull git
   
2. Compiling .less
   
3. Minifying .css and .tmpl
   
4. Babel'izirovat .js
   
5. Uglyfy'ing .js
   
6. Adding sourcemaps
   
7. Copy to /var/http
   

Now this case needs to be somehow sent to the production server. Hence the questions:
1. Where is it better to run the command? on test, or on combat?
2. Should I use a git repository as an intermediary? (on test push, on combat pull)
3. What is the best way to copy? By ftp? How can I explain to gulp that it does not copy all the files every time, but only the ones that have changed? (the standard since from 4.0 won't help here)
PS: I'm a beginner in the gallop, so don't hit with stones =)