Github clone failing on internal repository

Hi I have deployed Drone using the official helm charts to an EKS cluster.
I am able to connect to the server but my pipelines are failing on the clone step with the following error

1 Initialized empty Git repository in /drone/src/.git/
2 + git fetch origin +refs/heads/try-drone:
3 fatal: unable to access ‘https://github.com/myorg/myrepo.git/’: Failed to connect to github.com port 443: Connection refused

I have spent a day trying to find the reason for the above.

I’ll really appreciate any help.

Regards,

Nas

Can anyone please help on the above?