Allow pre-receive hook customization

This hook can be used for example to reject too large commits and it is
executed before "update" hook, used exclusively by Gogs to update its state.

https://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks

modules/git/hooks.go

@@ -27,6 +27,7 @@ var hookNames = []string{
 	"post-checkout",
 	"post-merge",
 	"pre-push",
+	"pre-receive",
 	// "update",
 	"post-receive",
 	"post-update",