Oh, I'm gonna getcha, I'm gonna getcha real good
Yeah, you can betcha, oh, I'm gonna getcha
(I'm gonna getcha) just like I should, I'll getcha good
Oh, I'm gonna getcha good!

From the song "I'm gonna getcha good" by SHANIA TWAIN

I ask few people. Some said it means " I know you well." Some said " I'll get you back" and some said I'll hurt you.

I'm not a native speaker so I really don't know this.

Does anybodoy know what it really means?