I\'m currently using GitHub over HTTPS and have the latest version of Git installed (1.9.0) along with the Git credential helper on Windows 7.
On setting up my envir
On my first attempt to Git fetch after my password change, I was told that my username/password combination was invalid. This was correct as git-credential helper had cached my old values.
However, I attempted another git fetch after restarting my terminal/command-prompt and this time the credential helper prompted me to enter in my GitHub username and password.
I suspect the initial failed Git fetch request in combination with restarting my terminal/command-prompt resolved this for me.
I hope this answer helps anybody else in a similar position in the future!