Can i get updates from Lemmy if i deploy my fork on Gitea?

I'm not that technical person, i need to hear from you. I'm planning to hire someone to modify a Lemmy fork for me as i need to add new features, also i have to declare the source code to align with AGPL-3.

The question is, if i put my code on self-hosetd Gitea can i get the important updates from the master brunch of lemmy on github? especially the security updates.

Please tell me if this is possible!