Git is source control system that has risen to new heights. Even Team Foundation Server no exposes Git. Many use the Git command line operations but I always prefer the visual tools for day to day work. Atlasian, produces of Jira, Confluence, Stash, Bamboo, have a tool call SourceTree which is a excellent tool for managing Git. You can download it for Windows or Mac here http://www.sourcetreeapp.com/.