Good news! Git plugin for TeamCity from JetBrains guys is available at http://www.jetbrains.net/confluence/display/TW/Git. This plugin is much better than 3rd party git plugin for TC. Git Plugin isn’t bundled in TeamCity 4.5, but it is easy to install it. See instructions and documentation at http://www.jetbrains.net/confluence/display/TW/Git
My Way 