How to configure remote upstream without `git push`?

@shyann 

To configure a remote upstream without using git push, you can use the following steps:

1. Add the remote upstream repository to your local repository using the following command:

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git remote add upstream <remote_repository_url>

Replace <remote_repository_url> with the actual URL of the upstream repository.

1. Fetch the changes from the upstream repository to sync your local repository with it using the following command:

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git fetch upstream

1. Merge the changes from the remote upstream repository into your local repository using the following command (assuming you are on the master branch):

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git merge upstream/master

By following these steps, you can configure a remote upstream repository without using git push and keep your local repository in sync with the upstream repository.