Below are some links to resources on learning more about Git. A distributed version control system, that is widely used for software development.
Understanding Git — Explain it Like I’m Five
Learn Git with tutorials and best practices
A. B. C. of GIT - Version Control System
10 Reasons Why You Should Be Using Git In Software Projects
Easy Git Guide and Reference for the Busy
Git Pull vs Git Fetch (and Stashing)
How to Write a Git Commit Message
How to undo (almost) anything with Git
Git Workflows with Tim Pettersen (Podcast)
A beginner's guide to GIT BISECT - The process of elimination
Tech Guy DIY - Beginners Guide to Git
Five Key Git Concepts Explained the Hard Way
Learn Git in 20 Minutes (Video)
Little Things I Like to Do with Git
Two Ways to Share Git Hooks with Your Team
Git Better! Learn Aliases, Settings, Tools, Background
16 awesome git aliases that you will love
Private Git Repository on Any Computer
How To Host Your Own Private Git Repositories
Git Ready - daily tips for the noob to the guru
Algo Tech Solutions - Git Tips and Tricks
Most commonly used git tips and tricks.
How to create custom git aliases for a project
Git Tips hosted by @chrishunt (Podcast)
Adding more changes to your last commit
TL;DR — pre-commit hooks can save you from embarrassment and improve workflow
Moving git commits between repos
Using Advanced Rebase Features for a Clean Repository
How to write a git commit message that won't disappoint your future self
How to git squash quickly without messing up
Useful git commands for everyday use!
Using Aliases to Speed Up Your Git Workflow
How to save a puppy by creating a clean Git repo
5 best practices for using Git
15 Git Commands You May Not Know
The Architecture of Open Source Applications: Git
Poking Git (Video)
Git from the inside out (Video)
Deep Dive into Git - Edward Thomson (Video)
Clara Bennett - Git: A Peek Under the Hood (Video)
GitSheet - A dead simple git cheatsheet
0xAX - git cheat sheets in your command line
A list of cool features of Git and GitHub
Git Commands and Best Practices Cheat Sheet
Git Cheat Sheet: Useful Commands, Tips and Tricks
My Git Cheatsheet (with references)
Interactive Git Cheatsheet with Visualisation
Building Git - A deep dive into the internals of the Git version control system. By rebuilding it in a high-level programming language.
Pro Git - Pro Git (Second Edition) is your fully-updated guide to Git and its usage in the modern world.
Peepcode Git Internals - A PDF by Scott Chacon about how the Git source code control system stores files and revisions.
Github - A web-based Git repository hosting service.
Gitly - A fast & powerful development service.
Gitolite - Setup git hosting on a central server.
Gogs - Go Git Service, a painless self-hosted Git service.
GitLab - Provides Git repository management, code reviews, issue tracking, activity feeds and wikis. GitLab itself is also free software.
Gitea - Git with a cup of tea. A painless self-hosted Git service.
Bitbucket - A web-based hosting service for projects that use either the Mercurial or Git.