To turn on autocorrect feature of git, run :

git config --global help.autocorrect 10

After setting this, if you make a mistake in git commands, git autocorrects it. Example :

~/C/srih4ri.github.com (master ☡=) git addd .
WARNING: You called a Git command named 'addd', which does not exist.
Continuing under the assumption that you meant 'add'
in 1.0 seconds automatically...

The ‘10’ in the end says git will wait for 1 second ( 10 * 0.1 second ) before it auto corrects and proceeds with the command. If you need git to wait longer, say 5 seconds( 50 * 0.1 seconds ), run git config --global help.autocorrect 50.