[...]

No conditional flags passed
from available:
--with   :	
--without:	 x
Available branches: AC-branch RA-branch master rpm3
--2015-07-28 11:06:38--  http://distfiles.pld-linux.org/distfiles/by-md5/f/a/fa1edf3015d5146790de260adaa5071c/v0.86.tar.gz
Resolving distfiles.pld-linux.org (distfiles.pld-linux.org)... 193.239.45.41
Connecting to distfiles.pld-linux.org (distfiles.pld-linux.org)|193.239.45.41|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 83720 (82K) [application/x-gzip]
Saving to: 'v0.86.tar.gz'
     0K .......... .......... .......... .......... .......... 61%  784K 0s
    50K .......... .......... .......... .                    100% 1001K=0.1s
2015-07-28 11:06:39 (856 KB/s) - 'v0.86.tar.gz' saved [83720/83720]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/mtr-0.86-2.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 30c8feb... - release 2 (by relup.sh)
fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	
--without:	 x
Writing git revision for tag auto/ti/mtr-0.86-2
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.12342
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf mtr-0.86
Begin-PLD-Builder-Info
Build-Time: user:3.39s sys:2.32s real:12.23s (faults io:0 non-io:321638)
Files queued for ftp:
     98529 mtr-0.86-2.src.rpm
       180 mtr-0.86-2.src.rpm.uploadinfo
End-PLD-Builder-Info