No, download the latest ZIP file from the above URL.
Then use the ./as-upgrader.sh script with the 1.0.9-SNAPSHOT version identifer on the extracted ZIP file. You will need to do both steps due to https://issues.jboss.org/browse/JBJCA-754.
Or start with https://community.jboss.org/wiki/HackingonAS7 , and do <version.org.jboss.ironjacamar>1.0.9-SNAPSHOT</version.org.jboss.ironjacamar> in the main pom.xml file.