git/Documentation/config/user.txt

user.email::
	Your email address to be recorded in any newly created commits.
	Can be overridden by the `GIT_AUTHOR_EMAIL`, `GIT_COMMITTER_EMAIL`, and
	`EMAIL` environment variables.  See linkgit:git-commit-tree[1].

user.name::
	Your full name to be recorded in any newly created commits.
	Can be overridden by the `GIT_AUTHOR_NAME` and `GIT_COMMITTER_NAME`
	environment variables.  See linkgit:git-commit-tree[1].

user.useConfigOnly::
	Instruct Git to avoid trying to guess defaults for `user.email`
	and `user.name`, and instead retrieve the values only from the
	configuration. For example, if you have multiple email addresses
	and would like to use a different one for each repository, then
	with this configuration option set to `true` in the global config
	along with a name, Git will prompt you to set up an email before
	making new commits in a newly cloned repository.
	Defaults to `false`.

user.signingKey::
	If linkgit:git-tag[1] or linkgit:git-commit[1] is not selecting the
	key you want it to automatically when creating a signed tag or
	commit, you can override the default selection with this variable.
	This option is passed unchanged to gpg's --local-user parameter,
	so you may specify a key using any method that gpg supports.