mkdir study cd study git init githw1

cd githw1 git add README.md git commit -m 'repo: add a README file'

git branch first_branch git status git add README.md git commit -m 'feat(README): add commands to resolve subtask 1'

git switch master git add README.md git commit -m 'feat(README): add commands to resolve subtask 2' git log --oneline --graph --decorate=short --all