Pip install from company network

We have strict restrictions for anyone doing pip install against pypi or any other external source.
To build an NLP model, I understand we need model libraries as well as datasets.
The transformer model is available here transformers · PyPI , which I am able to get in the network through proper channels.
However, can someone please advise if the transformer libraries seek to download dataset or any other artifacts from some other locations (e.g. github, s3). If yes, what that location is and where in the transformer code do I need to make changes to any reference so as to download them from my local network instead of going out to S3 or github