Answers

Here are the answers to the questions given above:

1. Use git push to publish your changes, and use git fetch or git pull (or git remote update) to get changes from the remote repository.
2. The fetch operation only downloads changes and updates the remote-tracking branches, while the pull operation also tries to update the current branch with merge or rebase (if it is configured as tracking some branch in the remote repository).
3. You can use git branch -d -r to delete individual remote-tracking branches, or git remote prune to delete all stale remote-tracking branches.