git credential-cache---daemon [--debug] <socket>
You probably don't want to invoke this command yourself; it is started automatically when you use git-credential-cache(1).
This command listens on the Unix domain socket specified by <socket> for git-credential-cache clients. Clients may store and retrieve credentials. Each credential is held for a timeout specified by the client; once no credentials are held, the daemon exits.
Part of the git(1) suite