If you want to try out git main version of avrdude binary, you can try out my snapshots here. https://github.com/mcuee/avrdude-packing/releases/tag/snapshot_28Nov2022
I am using the build infrastructure from Arduino. You can also download their snapshot here (a bit older version than my build). https://github.com/arduino/avrdude-packing/releases/tag/7.0-arduino.4-rc1 -- Xiaofan
