Git on Mac OS X v10.7 (Lion)
The default install location is /usr/local, so add this to your ~/.bash_profile file:
export PATH=$PATH:/usr/local/git/bin/
Then run source ~/.bash_profile in Terminal.
If you do not want to install Xcode and/or MacPorts/Fink/Homebrew, you could always use the standalone installer: https://sourceforge.net/projects/git-osx-installer/