[...]

fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	
--without:	 tests
Available branches: master
--2015-03-10 17:26:02--  http://distfiles.pld-linux.org/distfiles/by-md5/c/5/c5d923fd727fea3f4b3aa91bad5ccf47/Test-Warnings-0.020.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: 33239 (32K) [application/x-gzip]
Saving to: 'Test-Warnings-0.020.tar.gz'
     0K .......... .......... .......... ..                   100% 1.01M=0.03s
2015-03-10 17:26:02 (1.01 MB/s) - 'Test-Warnings-0.020.tar.gz' saved [33239/33239]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/perl-Test-Warnings-0.020-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at c9d0fed... - updated to 0.020 - pl
fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	
--without:	 tests
Writing git revision for tag auto/ti/perl-Test-Warnings-0.020-1
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.45179
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf Test-Warnings-0.020
Begin-PLD-Builder-Info
Build-Time: user:2.60s sys:1.06s real:4.66s (faults io:0 non-io:153142)
Files queued for ftp:
     39442 perl-Test-Warnings-0.020-1.src.rpm
       196 perl-Test-Warnings-0.020-1.src.rpm.uploadinfo
End-PLD-Builder-Info