ecf-rpmtools provides a set of wrappers for building RPMs using mock, rpmlint, and rpm signing. A standard build might look like:
make rpm-nosign
make linti
make rpm-sign
make copy
make deploy
This should get you started (assuming you've installed everything into /usr/libexec/ecf-rpmtools):
ln -s /usr/libexec/ecf-rpmtools/rpmmacros ~/.rpmmacros
mkdir -p ~/pkg/MYTOOL
cd ~/pkg/MYTOOL
ln -s /usr/libexec/ecf-rpmtools/Makefile ~/pkg/MYTOOL
cp /usr/libexec/ecf-rpmtools/Makefile.local ~/pkg/MYTOOL
...then modify Makefile.local.