found.
* A colon, followed by a slash, followed by a text (e.g. `:/fix nasty bug`): this names
- a commit whose commit message starts with the specified text.
+ a commit whose commit message matches the specified regular expression.
This name returns the youngest matching commit which is
reachable from any ref. If the commit message starts with a
'!', you have to repeat that; the special sequence ':/!',
followed by something else than '!' is reserved for now.
+ The regular expression can match any part of the commit message. To
+ match messages starting with a string, one can use e.g. `:/^foo`.
* A suffix ':' followed by a path (e.g. `HEAD:README`); this names the blob or tree
at the given path in the tree-ish object named by the part