This plugin allows the use of URLs as an SCM plugin
This does duplicate some of what the URL Trigger plugin does.
Benefits this plugin over the URL Trigger are:
1. You can choose your own polling schedule via the SCM Polling trigger.
2. Less resource intensive polling mechanism, since checking last-modified requires few bytes to transfer, regardless of the amount of data in the URL.
Benefits of URL Trigger over this plugin:
1. Hudson only supports one SCM plugin per project. If you want to trigger an SCM checkout via a URL, then URL Trigger is a better choice.
2. The last-modified property of a URL is not the right trigger for your builds, instead you need the content of the URL to change to trigger a build.