commit hash of `godot_cpp` submodule no longer seems to exist

[Libadoxon]

Godot version

4.3.stable.nixpkgs.77dcf97d8

godot-cpp version

N/a

System information

Linux (NixOs)

Issue description

When trying to clone with git clone --recurse-submodules https://github.com/hazelnutcloud/godot-llama-cpp.git it complains with

fatal: Fetched in submodule path 'godot_cpp', but it did not contain a6e8063e2a7868853ecce21ab6cff38417663ad9. Direct fetching of that commit failed.

Trying to build with latest commit of godot_cpp fails