[...]

fatal: HEAD does not point to a branch
Available branches: AC-branch giflib-4 master
Searching for tag auto/ti/giflib-5.1.0-1...
Searching for tag auto/ti/giflib-5_1_0-1...
--2015-03-18 16:37:18--  http://distfiles.pld-linux.org/distfiles/by-md5/c/7/c7e9f1c10b755ab955156d4c1ac7fc5d/giflib-5.1.0.tar.bz2
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: 621155 (607K) [application/x-bzip2]
Saving to: 'giflib-5.1.0.tar.bz2'
     0K .......... .......... .......... .......... ..........  8%  813K 1s
    50K .......... .......... .......... .......... .......... 16% 1.53M 0s
   100K .......... .......... .......... .......... .......... 24% 1.59M 0s
   150K .......... .......... .......... .......... .......... 32% 1.67M 0s
   200K .......... .......... .......... .......... .......... 41% 11.5M 0s
   250K .......... .......... .......... .......... .......... 49% 2.02M 0s
   300K .......... .......... .......... .......... .......... 57% 6.93M 0s
   350K .......... .......... .......... .......... .......... 65% 10.9M 0s
   400K .......... .......... .......... .......... .......... 74% 2.10M 0s
   450K .......... .......... .......... .......... .......... 82% 11.4M 0s
   500K .......... .......... .......... .......... .......... 90% 10.9M 0s
   550K .......... .......... .......... .......... .......... 98% 11.4M 0s
   600K ......                                                100% 13.4M=0.2s
2015-03-18 16:37:18 (2.57 MB/s) - 'giflib-5.1.0.tar.bz2' saved [621155/621155]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/giflib-5.1.0-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at c533586... - up to 5.1.0
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/giflib-5.1.0-1
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.36346
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf giflib-5.1.0
Begin-PLD-Builder-Info
Build-Time: user:2.66s sys:1.30s real:9.93s (faults io:0 non-io:194614)
Files queued for ftp:
    629022 giflib-5.1.0-1.src.rpm
       184 giflib-5.1.0-1.src.rpm.uploadinfo
End-PLD-Builder-Info