The Day 1 Guided Tutorial was led by Christina Hedges, walking through the basics of using git and GitHub for version control and collaborative coding. Her complete materials for that tutorial (and more on other topics) are available in her incredibly useful Astronomy Workflow page.
ers-transit/hackathon-2021-day1
Tutorial and files for Day 1 of the summer 2021 ERS Pre-Launch Data Hackathon.
MIT