How can I include the git commit hash in Xcode?

I've written an implementation based on the answer cited by gagarwal. I added this build script to my build phases before the compilation phase:

/usr/libexec/PlistBuddy -c "Set :GIT_COMMIT_HASH `git rev-parse HEAD`" "${TARGET_BUILD_DIR}"/"${INFOPLIST_PATH}"

In my code I reference it by calling:

[[NSBundle mainBundle] infoDictionary][@"GIT_COMMIT_HASH"];

And voila, your last commit hash value is available at run-time!

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