[...]

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.
If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:
  git checkout -b new_branch_name
HEAD is now at 3560e83... - updated to 1.09
fatal: HEAD does not point to a branch
Available branches: AC-branch master
--2015-07-28 10:36:30--  http://distfiles.pld-linux.org/distfiles/by-md5/7/6/76b53e2be4c5b85e4af0887ce838c955/sdparm-1.09.tar.xz
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: 245688 (240K) [application/octet-stream]
Saving to: 'sdparm-1.09.tar.xz'
     0K .......... .......... .......... .......... .......... 20%  782K 0s
    50K .......... .......... .......... .......... .......... 41% 1.46M 0s
   100K .......... .......... .......... .......... .......... 62% 1.51M 0s
   150K .......... .......... .......... .......... .......... 83% 1.59M 0s
   200K .......... .......... .......... .........            100% 12.1M=0.2s
2015-07-28 10:36:30 (1.43 MB/s) - 'sdparm-1.09.tar.xz' saved [245688/245688]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/sdparm-1.09-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 3560e83... - updated to 1.09
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/sdparm-1.09-1
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.43588
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf sdparm-1.09
Begin-PLD-Builder-Info
Build-Time: user:2.91s sys:1.65s real:10.76s (faults io:0 non-io:202381)
Files queued for ftp:
    251326 sdparm-1.09-1.src.rpm
       183 sdparm-1.09-1.src.rpm.uploadinfo
End-PLD-Builder-Info