github checkout
# Open/checkout a previous branch
git checkout ＜existing-branch＞
# Open/checkout a previous commit
git checkout <commit> [when commit is not a branch name
# Create a new branch from current branch
git checkout -b ＜new-branch＞
# Create a new branch from existing-branch
git checkout -b ＜new-branch＞ ＜existing-branch＞
# Go/Checkout to last commit or branch reset
git checkout .