[...]

n 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.6956
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf gdb-8.2.1
Begin-TLD-Builder-Info
Build-Time: user:1.46s sys:0.26s real:7.46s (faults io:12 non-io:282252)
Files queued for ftp:
  20297038 gdb-8.2.1-1.src.rpm
       181 gdb-8.2.1-1.src.rpm.uploadinfo
End-TLD-Builder-Info