[...]

 28500K .......... .......... .......... .......... .......... 96% 77.1M 0s
 28550K .......... .......... .......... .......... .......... 96% 83.5M 0s
 28600K .......... .......... .......... .......... .......... 96% 80.0M 0s
 28650K .......... .......... .......... .......... .......... 96% 55.3M 0s
 28700K .......... .......... .......... .......... .......... 96% 81.1M 0s
 28750K .......... .......... .......... .......... .......... 96% 94.3M 0s
 28800K .......... .......... .......... .......... .......... 97% 4.00M 0s
 28850K .......... .......... .......... .......... .......... 97% 84.2M 0s
 28900K .......... .......... .......... .......... .......... 97% 1.64M 0s
 28950K .......... .......... .......... .......... .......... 97% 74.2M 0s
 29000K .......... .......... .......... .......... .......... 97% 75.1M 0s
 29050K .......... .......... .......... .......... .......... 98% 39.7M 0s
 29100K .......... .......... .......... .......... .......... 98% 69.9M 0s
 29150K .......... .......... .......... .......... .......... 98%  238M 0s
 29200K .......... .......... .......... .......... .......... 98% 3.86M 0s
 29250K .......... .......... .......... .......... .......... 98%  202M 0s
 29300K .......... .......... .......... .......... .......... 98% 92.0M 0s
 29350K .......... .......... .......... .......... .......... 99% 1.64M 0s
 29400K .......... .......... .......... .......... .......... 99% 76.0M 0s
 29450K .......... .......... .......... .......... .......... 99% 81.3M 0s
 29500K .......... .......... .......... .......... .......... 99% 34.5M 0s
 29550K .......... .......... .......... .......... .......... 99%  251M 0s
 29600K .......... .......... .......... .......... .......... 99% 73.1M 0s
 29650K .......... .......... .......... .......... ...       100% 3.35M=3.6s
2019-01-21 10:28:46 (8.01 MB/s) - 'mozjs-52.7.4.tar.bz2' saved [30406120/30406120]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/mozjs52-52.7.4-3.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at a8ec6e5 - release 3
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/mozjs52-52.7.4-3
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.94249
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf mozjs-52.7.4
Begin-TLD-Builder-Info
Build-Time: user:1.76s sys:0.26s real:7.40s (faults io:0 non-io:127410)
Files queued for ftp:
  29814783 mozjs52-52.7.4-3.src.rpm
       186 mozjs52-52.7.4-3.src.rpm.uploadinfo
End-TLD-Builder-Info