A shot summary of the most-needed survival pages for git:

• For svn-addicted veterans: 
  • A tutorial https://git.wiki.kernel.org/index.php/GitSvnCrashCourse
  • An educational comparison of concepts: http://www.codemag.com/Article/1105101/Git-for-Subversion-Users
• A small flame war with practical hints, anyways: http://steveko.wordpress.com/2012/02/24/10-things-i-hate-about-git/
• Specifying git shell in authorized_keys: https://superuser.com/questions/299927/can-you-specify-git-shell-in-ssh-authorized-keys-to-restrict-access-to-only-git
• Using git with a central repository: http://toroid.org/git-central-repo-howto
• GitHub support for Subversion clients