Here is a list of all branches and their exercise themes:
exo/oops-i-fucked-up => Learn how to undo your mistakes after manipulating your git history.
exo/rebase-basic => [Optional] Basic rebase exercise. Do this if you've never done a rebase before, or to refresh your memory.
exo/rebase-interactive-fixup => Rebase interactive, learn how to use the fixup / squash commands.
exo/rebase-interactive-squash => More practice with rebase interactive, learn how to use --keep-base and the reword command.
exo/rebase-interactive-editing => Still more rebase interactive, learn how to use the edit command.
exo/rebase-onto => Learn how to rebase on a different branch than the original base, using the --onto option.
exo/rebase-fork-point => [Optional] Learn how to fix a branch that is rebased off a commit that has since been dropped or squashed from the original base, using the --fork-point option.
To do an exercise, simply git switch to that branch and read the EXERCICE.md file.