When working on a project, it is much easier to work on features and bugs in isolation of the rest of the project. We can do this with git branches; a branch is a copy of the working directory, staging area, and project history; we create a branch, then check it out, then add commits. After our feature has been built, we can then merge it back into the main stable branch - which is master by default. In this lesson we go over how to create a branch with git branch {branch-name}, viewing all branches with git branch, switching branches with git checkout plus a few helper commands.
To switch between current branch and last checkout branch:
git checkout -
[Practical Git] Switching between current branch and last checkout branch
原文：http://www.cnblogs.com/Answer1215/p/5755254.html