git-work-with-upstream.sh

##
# Sync with upstream
###

# add upstream
git remote add upstream <git_remote_url>

# fetch changes
git fetch upstream

# rebase current main (or master) with upstream
git rebase upstream/main

# push changes to fork's remote
git push origin main --force

##
# Fork as a private repo
###

# bare clone
git clone --bare <git_remote_url>

# push as a mirror
cd <git_remote_repo_name>
git push --mirror <git_private_fork_url>

# now you can remove that folder
cd ..
rm -rf <git_remote_repo_name>