[...]

fatal: HEAD does not point to a branch
Building perl-IO-Interface.spec with the following conditional flags:
 --without tests
from available:
--with   :	 tests
--without:	
Available branches: master
--2015-03-10 22:16:49--  http://distfiles.pld-linux.org/distfiles/by-md5/7/d/7d77d0f23ee7f577109fc5f0e67e0a4b/IO-Interface-1.06.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: 10339 (10K) [application/x-gzip]
Saving to: 'IO-Interface-1.06.tar.gz'
     0K ..........                                            100% 28.0M=0s
2015-03-10 22:16:50 (28.0 MB/s) - 'IO-Interface-1.06.tar.gz' saved [10339/10339]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/perl-IO-Interface-1.06-4.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at ca6eef6... - release 4 (by relup.sh)
fatal: HEAD does not point to a branch
No conditional flags passed
from available:
--with   :	 tests
--without:	
Writing git revision for tag auto/ti/perl-IO-Interface-1.06-4
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.34049
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf IO-Interface-1.06
Begin-PLD-Builder-Info
Build-Time: user:2.60s sys:1.21s real:5.41s (faults io:0 non-io:182356)
Files queued for ftp:
     16201 perl-IO-Interface-1.06-4.src.rpm
       194 perl-IO-Interface-1.06-4.src.rpm.uploadinfo
End-PLD-Builder-Info