[...]

 67850K .......... .......... .......... .......... .......... 98% 73.4M 0s
 67900K .......... .......... .......... .......... .......... 98% 80.5M 0s
 67950K .......... .......... .......... .......... .......... 98%  367M 0s
 68000K .......... .......... .......... .......... .......... 98% 83.5M 0s
 68050K .......... .......... .......... .......... .......... 99% 78.6M 0s
 68100K .......... .......... .......... .......... .......... 99% 83.2M 0s
 68150K .......... .......... .......... .......... .......... 99%  366M 0s
 68200K .......... .......... .......... .......... .......... 99% 76.2M 0s
 68250K .......... .......... .......... .......... .......... 99% 80.2M 0s
 68300K .......... .......... .......... .......... .......... 99% 81.0M 0s
 68350K .......... .......... .......... .......... .......... 99%  364M 0s
 68400K .......... .......... .......... .......... .......... 99% 77.0M 0s
 68450K .......... .......... .......... .......... .......... 99% 84.9M 0s
 68500K .......... .......... .......... .......... .......... 99% 79.7M 0s
 68550K .......... .......... .......... .......... .......... 99%  402M 0s
 68600K .......... .......... .......... .......... .......... 99% 74.5M 0s
 68650K .......... .......... .......... .......... .......... 99% 66.1M 0s
 68700K .......... .......... .......... .........            100%  345M=0.7s
2018-03-06 13:36:54 (98.2 MB/s) - 'boost_1_59_0.tar.bz2' saved [70389425/70389425]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/mysql-5.7.21-20.1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 6e56373... - fix source URL
fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	 autodeps ndb sphinx system_boost systemtap tests
--without:	 big_tables federated innodb raid rocksdb ssl tcpd tokudb
Writing git revision for tag auto/ti/mysql-5.7.21-20.1
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.92455
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf percona-server-5.7.21-20
Begin-TLD-Builder-Info
Build-Time: user:6.33s sys:1.45s real:13.31s (faults io:12 non-io:335148)
Files queued for ftp:
 148608995 mysql-5.7.21-20.1.src.rpm
       187 mysql-5.7.21-20.1.src.rpm.uploadinfo
End-TLD-Builder-Info