Maven automatic SNAPSHOT update

Another option (which I use) is to include the following in your pom.xml. updatePolicy tag will force maven to always use latest snapshot from this repo.

<repositories>
    <repository>
        <id>you-snapshots</id>
        <url>http://host/nexus/repos/snapshots</url>
        <snapshots>
            <updatePolicy>always</updatePolicy>
        </snapshots>
        <releases>
            <updatePolicy>always</updatePolicy>
        </releases>
    </repository>
</repositories>

p.s. I always configure all repos in pom.xml because we use several CI servers and it will be quite hard to configure all of them (I am lazy…)

Doc on settings.xml updatePolicy for reference.
The frequency for downloading updates - can be "always", "daily" (default), "interval:XXX" (in minutes) or "never" (only if it doesn't exist locally).