Download failure from Maven central / unknown dependency - spotbugs 4.0.0-beta4

When I try to run a build with the current spotbugs-dependency I get build failures:

`Failed to execute goal com.github.spotbugs:spotbugs-maven-plugin: (spotbugs) on project fotorenamer: Execution spotbugs of goal com.github.spotbugs:spotbugs-maven-plugin: failed: Plugin com.github.spotbugs:spotbugs-maven-plugin: or one of its dependencies could not be resolved: Failure to find com.github.spotbugs:spotbugs:jar:4.0.0-beta4 in was cached in the local repository, resolution will not be reattempted until the update interval of google-maven-central has elapsed or updates are forced -> [Help 1]`

Is there a way to trigger a refresh on Travis Maven caches?
is delivered via Maven central as a local build proves.