[...]

 14000K .......... .......... .......... .......... .......... 93%  238M 0s
 14050K .......... .......... .......... .......... .......... 94%  235M 0s
 14100K .......... .......... .......... .......... .......... 94%  195M 0s
 14150K .......... .......... .......... .......... .......... 94%  160M 0s
 14200K .......... .......... .......... .......... .......... 95%  233M 0s
 14250K .......... .......... .......... .......... .......... 95%  245M 0s
 14300K .......... .......... .......... .......... .......... 95%  181M 0s
 14350K .......... .......... .......... .......... .......... 96%  232M 0s
 14400K .......... .......... .......... .......... .......... 96%  224M 0s
 14450K .......... .......... .......... .......... .......... 96%  246M 0s
 14500K .......... .......... .......... .......... .......... 97%  213M 0s
 14550K .......... .......... .......... .......... .......... 97%  228M 0s
 14600K .......... .......... .......... .......... .......... 97%  252M 0s
 14650K .......... .......... .......... .......... .......... 98%  246M 0s
 14700K .......... .......... .......... .......... .......... 98%  218M 0s
 14750K .......... .......... .......... .......... .......... 98%  252M 0s
 14800K .......... .......... .......... .......... .......... 99%  231M 0s
 14850K .......... .......... .......... .......... .......... 99%  252M 0s
 14900K .......... .......... .......... .......... .......... 99%  213M 0s
 14950K .......... .......... .......... ......               100%  268M=0.4s
2017-10-18 18:44:46 (38.2 MB/s) - 'go1.8.3.src.tar.gz' saved [15345996/15345996]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/golang-1.8.3-2.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Already on 'master'
Building golang.spec with the following conditional flags:
 --with bootstrap
from available:
--with   :	
--without:	 bootstrap cgo ext_linker shared tests verbose
Writing git revision for tag auto/ti/golang-1.8.3-2
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.93558
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf golang-1.8.3
Begin-TLD-Builder-Info
Build-Time: user:1.52s sys:0.44s real:6.27s (faults io:113 non-io:109785)
Files queued for ftp:
  15270402 golang-1.8.3-2.src.rpm
       184 golang-1.8.3-2.src.rpm.uploadinfo
End-TLD-Builder-Info