Very, very basic git workflow

git pull
git branch dev_branch
git checkout dev_branch
#make some changes
git checkout master
git merge dev_branch
git branch -d branch_to_delete
git push

Show all the branches

git branch

Create a new branch

git branch my_experimental_feature

Use that branch

git checkout my_experimental_feature

Pushing the new branch to a remote server

git push origin my_experimental_feature

Pulling that branch down on another machine

git pull origin my_experimental_feature

Listing all branches on other machine

git branch -a

Updating other machine

git pull origin my_experimental_feature