How do I get the real config value in Git?

It seems that git config only returns value that I explicitly set and doesn'开发者_运维问答t aware of the default values. For example when I run git config commit.status it outputs nothing.

http://git-scm.com/docs/git-config helps but doesn't list all of the default values.

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Unfortunately, I don't think this is possible. Perhaps someone more familiar with the git source code will correct me, but I think that the default values are typically hard-coded in the source files and overridden by the config variables. For example, the default for gc.pruneExpire is defined here and potentially overridden here when the configuration is checked. I don't think there's any mechanism for git config to get at that default value.