A recent Gerrit event from https://pubsubhelper.golang.org/recent looks like this:

{
	"Time": "2022-07-24T18:47:26.542273157Z",
	"Gerrit": {
		"URL": "https://go-review.googlesource.com/c/go/+/418734?usp=email",
		"Project": "go",
		"CommitHash": "e810f8204157253ccc66d7f3b4828551088bcd1a",
		"ChangeNumber": 418734
	}
},

Though it's a valid URL, the inclusion of the the "usp" query parameter in the change URL isn't something the caller will find helpful, and it's not helping the maintner corpus size either. We can trivially omit it.

Edit: This event is used only to wake up the maintnerd server, its content doesn't contribute to corpus size.