release.org handle concurrent builds of packages from same repo
release.org handle concurrent builds of packages from same repo

concurrent builds of packages from the same repo were achieved by
adding an internal clone_target that adds the repo and package names

also fix logic for when tags should receive prefixes (i.e. when
setup.py is located somewhere other than the working directory)

tgbugs/pyontutils,tgbugs/pyontutils,tgbugs/pyontutils,tgbugs/pyontutils