[...]

No conditional flags passed
from available:
--with   :	
--without:	 doc python2 python3 setuptools tests
Available branches: master
Searching for tag auto/ti/python-packaging-18.0-1...
Searching for tag auto/ti/python-packaging-18_0-1...
--2019-08-24 21:40:47--  http://distfiles.pld-linux.org/by-md5/b/0/b066f2a33524519cf4e97ab69f462479/packaging-18.0.tar.gz
Resolving distfiles.pld-linux.org (distfiles.pld-linux.org)... 193.239.45.41
Connecting to distfiles.pld-linux.org (distfiles.pld-linux.org)|193.239.45.41|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 48018 (47K) [application/x-gzip]
Saving to: 'packaging-18.0.tar.gz'
     0K .......... .......... .......... .......... ......    100%  577K=0.08s
2019-08-24 21:40:47 (577 KB/s) - 'packaging-18.0.tar.gz' saved [48018/48018]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/python-packaging-18.0-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 1f3ba4c - up to 18.0
fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	
--without:	 doc python2 python3 setuptools tests
Writing git revision for tag auto/ti/python-packaging-18.0-1
On detached HEAD. Use -r BRANCHNAME to override
error: Macro %_builddir has empty body
error: Macro %_builddir has empty body
Executing(--clean): env -i TMP=/home/users/builder/tmp HOME=/home/users/builder PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.96276
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf packaging-18.0
Begin-TLD-Builder-Info
Build-Time: user:0.74s sys:0.10s real:2.40s (faults io:0 non-io:103659)
Files queued for ftp:
     53069 python-packaging-18.0-1.src.rpm
       193 python-packaging-18.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info