[...]

  git checkout -b new_branch_name
HEAD is now at ec8e40c... - updated to 3.71
error: HEAD does not point to a branch
fatal: @{u} - not something we can merge
Building perl-HTML-Parser.spec with the following conditional flags:
 --without tests
from available:
--with   :	
--without:	 <tests>
Available branches: AC-branch RA-branch master
--2014-08-01 16:02:04--  http://distfiles.pld-linux.org/distfiles/by-md5/9/1/9128a45893097dfa3bf03301b19c5efe/HTML-Parser-3.71.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: 90368 (88K) [application/x-gzip]
Saving to: 'HTML-Parser-3.71.tar.gz'
     0K .......... .......... .......... .......... .......... 56%  764K 0s
    50K .......... .......... .......... ........             100%  595K=0.1s
2014-08-01 16:02:04 (680 KB/s) - 'HTML-Parser-3.71.tar.gz' saved [90368/90368]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/perl-HTML-Parser-3.71-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
Version: 3.71
Release: 1
tag: auto/ti/perl-HTML-Parser-3.71-1
Searching for tag auto/ti/perl-HTML-Parser-3.71-1...
Everything up-to-date
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 PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin HOME=/home/users/builder TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.1999
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf HTML-Parser-3.71
Begin-PLD-Builder-Info
Build-Time: user:2.38s sys:1.16s real:4.81s (faults io:0 non-io:163596)
Files queued for ftp:
     98329 perl-HTML-Parser-3.71-1.src.rpm
       193 perl-HTML-Parser-3.71-1.src.rpm.uploadinfo
End-PLD-Builder-Info