Can forks be synced automatically in gitHub?

Question

Stash enables automatic fork syncing if selected: https://confluence.atlassian.com/display/STASH/Keeping+forks+synchronized
It will update any branches in your fork that

Answer 1

You can create a Github App that use Github API to check the upstream repo periodically. Once an update is found, use Github API to create a pull request then call updateRef to update your branch to match master.

Or, just install this Github App that does exactly that

https://github.com/wei/pull