Your expression is good enough to follow, but your questions are relatively ill-posed (hence someone's vote to close it). As many Git experts note, to use Git effectively, you must understand how it works, not just "what command should I run?". I'd suggest reading one or all of these guides:
- http://www.sbf5.com/~cduan/technical/git/
- http://eagain.net/articles/git-for-computer-scientists/
- http://gitolite.com/gcs/
And then see if you actually need to ask your question at all.