Version control system concept
Git concepts: working directory <-> index (stage) <-> repository
Branches and commits
Moving up and down through you repo with git checkout
Information about current status wit git status, git log and git diff
Merging
Undoing changes with git reset and git revert
Working with upstream repositories: git clone, git fetch, git pull, git push
Experience with one of the following tools: GitHub, BitBucket, GitLab
.gitignore
Stashing