So here's fastest method of upgrading your hackintosh from macOS High Sierra to macOS Mojave. Thing is that you can do that like on regular mac. Yeah, you heard it right. Clover actually kick ass so you can go on with below steps and you should have your system ready to go in no time:

1. Update your clover to latest release (r4515 or newer)
2. Download most important kexts and place it under /EFI/CLOVER/kexts/Other/ (You can download it here: http://www.tonymacx86.com/resources/categories/kexts.11/)
3. Download macOS Mojave installer and run the beast :)
4. Choose your system drive (ie. Macintosh HD) as install destination
5. Installation will start. After first restart remember to pick Installer drive in Clover (ie. Boot macOS Install from YOUR DRIVE)
6. Finish the installation
7. Be patient, there's gonna be few restarts as well.
8. Install your own kext's
9. Done

If something fails, go to our forum forum. We're gonna help for sure.

Full tutorial is here: tutaj.