Don't modify source/working copy of condor.spec
Use edited condor.spec from temp dir
Don't need to copy srpm source files any more

These were being copied for out-of-source build trees since the makerpm
scripts were editing the source condor.spec ... But they don't anymore.
Don't need option for root of git tree anymore
Handle rpm and srpm targets in same script
Remove redundant script
Use git show/rev-parse instead of archive/log

These seem like better git commands for this than the ones originally
used here...  git rev-parse suggested by Nathan Panike.
Verify condor version string found in CMakeLists.txt
Cleanup for VERBOSE & mktemp

Add [VERBOSE=1] to usage summary, quote $PWD and avoid deprecated '-p'
for mktemp
Handle directory juggling a little differently