Mine

[oden@n5 BUILD]$ cat apache_rebuilder_main.sh
#!/bin/sh

# rebuilds apache packages. not very fool proof...
RPM_PACKAGES="`ls /SRPMS/main/release/apache-*`"

#################################################################################################################
for PACKAGE in $RPM_PACKAGES; do
    NAME=`rpm -qp --queryformat "[%{name}]\n" $PACKAGE`
    repsys co $NAME
    pushd $NAME
        rpmbuildupdate --nosource --nodownload --nobuild SPECS/$NAME.spec
        svn commit -m "- rebuild"
        mdvsys submit $NAME
    popd
    rm -rf $NAME
done