[...]

 15900K .......... .......... .......... .......... .......... 95% 7.25M 0s
 15950K .......... .......... .......... .......... .......... 95%  116M 0s
 16000K .......... .......... .......... .......... .......... 96%  106M 0s
 16050K .......... .......... .......... .......... .......... 96% 61.0M 0s
 16100K .......... .......... .......... .......... .......... 96%  179M 0s
 16150K .......... .......... .......... .......... .......... 96% 97.4M 0s
 16200K .......... .......... .......... .......... .......... 97% 1.51M 0s
 16250K .......... .......... .......... .......... .......... 97%  116M 0s
 16300K .......... .......... .......... .......... .......... 97%  224M 0s
 16350K .......... .......... .......... .......... .......... 98%  104M 0s
 16400K .......... .......... .......... .......... .......... 98% 6.35M 0s
 16450K .......... .......... .......... .......... .......... 98%  130M 0s
 16500K .......... .......... .......... .......... .......... 99%  258M 0s
 16550K .......... .......... .......... .......... .......... 99% 93.6M 0s
 16600K .......... .......... .......... .......... .......... 99% 85.9M 0s
 16650K .......... .......... .......... .......... .......... 99%  146M 0s
 16700K .......                                               100%  168M=1.5s
2019-06-01 22:10:24 (10.7 MB/s) - 'Python-3.7.3.tar.xz' saved [17108364/17108364]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/python3-3.7.3-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 99a90a7 - up to 3.7.3
fatal: HEAD does not point to a branch
Building python3.spec with the following conditional flags:
 --without tests
from available:
--with   :	 info verbose_tests
--without:	 optimizations system_mpdecimal <tests> tkinter
Writing git revision for tag auto/ti/python3-3.7.3-1
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.31260
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf Python-3.7.3
Begin-TLD-Builder-Info
Build-Time: user:2.68s sys:2.65s real:17.43s (faults io:116 non-io:225673)
Files queued for ftp:
  17148779 python3-3.7.3-1.src.rpm
       185 python3-3.7.3-1.src.rpm.uploadinfo
End-TLD-Builder-Info