It seems that git config only returns value that I explicitly set and doesn’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.
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.pruneExpireis defined here and potentially overridden here when the configuration is checked. I don’t think there’s any mechanism forgit configto get at that default value.