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• Here is how to get the latest version of codes from the main branch in a Git based repository.

git reset --hard HEAD
git pull

• The first lines git reset --hard HEAD is used to discard all uncommitted changes.
• Then finally the git pull is used to get latest codes from the main branch.
• I got this information from this StackOverflow discussion, http://stackoverflow.com/questions/6335681/git-how-do-i-get-the-latest-version-of-my-code.