Set your identifying information across all local repositories so your commits are properly attributed ¹:

git config --global user.name "Your Name"
git config --global user.email "your@email.com"

Initialize an existing directory as a new Git repository:

git init

Clone a repository from a GitHub link:

git clone [url]

Prepare your files for the next commit by "staging" them in the index ²:

git add [file]

Unstage a file while keeping the changes in your working directory:

git reset [file]

Check the current status of your working tree and staging area:

git status

Commit your staged content as a new snapshot with a descriptive comment:

git commit -m "[descriptive comment]"

Create a new local branch to start a fresh feature without affecting the main line ³:

git branch [branch-name]

Switch your working directory to a specific branch:

git checkout [branch-name]

Save all current changes into a temporary storage area:

git stash

Re-apply your stashed changes to the current branch:

git stash pop

Create a new commit that undoes the changes of a previous one:

git revert [SHA]

Apply the changes from a specific commit on another branch to your current one:

git cherry-pick [SHA]

Fetch all branches from the remote repository:

git fetch [alias]

Push local branch commits to the remote repository branch:

git push [alias] [branch]

Fetch and merge any remote commits from the tracking branch:

git pull

Merge a remote branch into your current local branch:

git merge [alias]/[branch]