e specified regular expression.
This name returns the youngest matching commit which is
reachable from any ref, including HEAD.
The regular expression can match any part of the
commit message. To match messages starting with a string, one can use
e.g. <em>:/^foo</em>. The special sequence <em>:/!</em> is reserved for modifiers to what
is matched. <em>:/!-foo</em> performs a negative match, while <em>:/!!foo</em> matches a
literal <em>!</em> character, followed by <em>foo</em>. Any other sequence beginning w