You might like the git-config option help.autocorrect

[qzdl]

(From Pro Git)

help.autocorrect

If you mistype a command, it shows you something like this:

$ git chekcout master
git: 'chekcout' is not a git command. See 'git --help'.

Did you mean this?
    checkout

Git helpfully tries to figure out what you meant, but it still refuses to do it. If you set help.autocorrect to 1, Git will actually run this command for you:

$ git chekcout master
WARNING: You called a Git command named 'chekcout', which does not exist.
Continuing under the assumption that you meant 'checkout'
in 0.1 seconds automatically...

Note that “0.1 seconds” business. help.autocorrect is actually an integer which represents tenths of a second. So if you set it to 50, Git will give you 5 seconds to change your mind before executing the autocorrected command.