See the latest changes:

git log

Check the status of your files:

git status

Committing something (changes are not at the remote repository):

git add <file_you_want_to_add>
git commit -m "commentary, explain here what you have changed"

Push (changes the remote repository to your current local version, can only be done if all changes of the remote repository are included in your local version):

git push

Pull (updates your local version by the changes made in the remote repository):

git pull

Create a new branch named newIssue:

git branch newIssue

Switch to another branch:

git checkout newIssue

Switch back to master:

git checkout master