Overriden value of alpha is being used where?

[Saranga7]

In the code prompt provided in the README:

python train.py k=100 generator=stylegan2 generator.feature_layer=conv1 hparams.batch_size=8 generator.class_name=ffhq model=nonlinear model.alpha=1

I am confused as to where is this model.alpha being used as you define:

model: torch.nn.Module = instantiate(cfg.model, k=cfg.k).to(device)

Is instantiate responsible for overriding the value of alpha? Otherwise the default value of alpha = 0.1 is used for all runs despite the user setting a different alpha.

PS : I'm new to Hydra, I apologize in advance if this is a dumb question