How to make a copy of an Eclipse update site

I'll probably never do it again, but just in case:

$ECLIPSE_HOME/eclipse -nosplash -verbose \
  -application org.eclipse.equinox.p2.metadata.repository.mirrorApplication \
   -source http://download.eclipse.org/releases/mars/ \
    -destination ~/tmp/mars-mirror-meta

$ECLIPSE_HOME/eclipse -nosplash -verbose \
    -application org.eclipse.equinox.p2.artifact.repository.mirrorApplication \
       -source http://download.eclipse.org/releases/mars/ \
           -destination ~/tmp/mars-mirror-arte