An introduction to version control using Git.
The rendered content can be viewed here:
https://cemac.github.io/sc-git/
This is a slightly modified version of the Sofware Carpentries git lessons:
https://github.com/swcarpentry/git-novice
with some content (branches episode) copied from the Carpentries Incubator version of the lessons:
https://github.com/carpentries-incubator/git-novice-branch-pr