These jars aren't available in maven 1 repo : http://www.ibiblio.org/maven/org.apache.maven.scm/jars/
The problem with jars not being available has been fixed now. Latest version of maven-scm at this time is 1.0-beta-2.
These jars aren't available in maven 1 repo : http://www.ibiblio.org/maven/org.apache.maven.scm/jars/