`grep.lineNumber`::
	If set to `true`, enable `-n` option by default.

`grep.column`::
	If set to `true`, enable the `--column` option by default.

`grep.patternType`::
	Set the default matching behavior. Using a value of `basic`, `extended`,
	`fixed`, or `perl` will enable the `--basic-regexp`, `--extended-regexp`,
	`--fixed-strings`, or `--perl-regexp` option accordingly, while the
	value `default` will use the `grep.extendedRegexp` option to choose
	between `basic` and `extended`.

`grep.extendedRegexp`::
	If set to `true`, enable `--extended-regexp` option by default. This
	option is ignored when the `grep.patternType` option is set to a value
	other than `default`.

`grep.threads`::
	Number of grep worker threads to use. If unset (or set to 0), Git will
	use as many threads as the number of logical cores available.

`grep.fullName`::
	If set to `true`, enable `--full-name` option by default.

`grep.fallbackToNoIndex`::
	If set to `true`, fall back to `git grep --no-index` if `git grep`
	is executed outside of a git repository.  Defaults to `false`.
