As a German, it is probably not surprising that I knew about it, yes; not necessarily about the specific name/place, but the general. Simply also for the reason that we always get to hear it with the record of the Reichstags address the next day, that is also referenced above.
Polen hat heute Nacht zum ersten Mal auf unserem eigenen Territorium auch mit bereits regulären Soldaten geschossen. Seit 5:45 Uhr wird jetzt zurückgeschossen!
Roughly: "Tonight, for the first time Poland fired shots on our own territory, also with regular troops. Since 5:45 we are now shooting back!"
In most (at least German) TV documentaries about the start of WW2 the staged attack becomes a topic, to denounce the claim in the speech, and to depict the criminal energy applied to it.
There is another incident a week earlier, that I only learned about in recent years (might have been a post on this forum): Jabłonków incident
Jabłonków incident (Polish: Incydent jabłonkowski, Czech: Jablunkovský incident) refers to the events of the night of August 25/26, 1939, along the Polish-Slovak border, when a group of German Abwehr agents attacked a rail station in Mosty. The main purpose of the attack was to capture the Jablunkov Pass, with its strategic railroad tunnel, until the arrival of the German armed forces. The attackers were repelled by units of the Polish Army, and the incident is regarded as a prelude to the German invasion of Poland. The Jabłonków Incident has been named the first commando operation of the Second World War.