[...]

ng git revision for tag auto/ti/exim-4.89-7
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.37029
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf exim-4.89
Begin-TLD-Builder-Info
Build-Time: user:0.94s sys:0.28s real:7.61s (faults io:0 non-io:310901)
Files queued for ftp:
   2436824 exim-4.89-7.src.rpm
       181 exim-4.89-7.src.rpm.uploadinfo
End-TLD-Builder-Info