Note: Adding an upstream is roughly equivalent to doing a fork on GitHub

reference: https://stackoverflow.com/a/52954199/8116031

commands:

git lfs install

git remote add upstream git@jugit.fz-juelich.de:hds-lee/hds-lee-poster-template.git

git fetch upstream

git pull upstream main --allow-unrelated-histories

on last cmd, error: 'Smudge error: Error downloading latex/examples/example_rwth.pdf'. So copied and added that pdf manually