Run commands in the root directory of this repository.
./bin/qmk compile && sudo dfu-programmer atmega32u4 erase && sudo dfu-programmer atmega32u4 flash ./dztech_dz65rgb_v2_jumper149.hex && sudo dfu-programmer atmega32u4 reset
./bin/qmk compile
Use qmk flash
or if it is broken (unknown reason) you can try this workaround.
I personally had some problems on ArchLinux, that I didn't debug any further though.
sudo dfu-programmer atmega32u4 erase
sudo dfu-programmer atmega32u4 flash ./dztech_dz65rgb_v2_jumper149.hex
sudo dfu-programmer atmega32u4 reset