[...]

  git checkout -b new_branch_name
HEAD is now at bddfe77... - updated to 1.7.9
fatal: HEAD does not point to a branch
Available branches: master
Searching for tag auto/ti/xorg-lib-libXi-1.7.9-1...
Searching for tag auto/ti/xorg-lib-libXi-1_7_9-1...
--2017-04-13 07:26:00--  http://distfiles.pld-linux.org/distfiles/by-md5/1/f/1f0f2719c020655a60aee334ddd26d67/libXi-1.7.9.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: 486312 (475K) [application/x-bzip2]
Saving to: 'libXi-1.7.9.tar.bz2'
     0K .......... .......... .......... .......... .......... 10% 1.05M 0s
    50K .......... .......... .......... .......... .......... 21% 2.09M 0s
   100K .......... .......... .......... .......... .......... 31%  111M 0s
   150K .......... .......... .......... .......... .......... 42%  292M 0s
   200K .......... .......... .......... .......... .......... 52% 2.15M 0s
   250K .......... .......... .......... .......... .......... 63% 97.7M 0s
   300K .......... .......... .......... .......... .......... 73%  298M 0s
   350K .......... .......... .......... .......... .......... 84%  105M 0s
   400K .......... .......... .......... .......... .......... 94% 2.24M 0s
   450K .......... .......... ....                            100%  273M=0.1s
2017-04-13 07:26:01 (3.99 MB/s) - 'libXi-1.7.9.tar.bz2' saved [486312/486312]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/xorg-lib-libXi-1.7.9-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at bddfe77... - updated to 1.7.9
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/xorg-lib-libXi-1.7.9-1
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.90185
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libXi-1.7.9
Begin-TLD-Builder-Info
Build-Time: user:0.55s sys:0.15s real:2.04s (faults io:0 non-io:98575)
Files queued for ftp:
    492566 xorg-lib-libXi-1.7.9-1.src.rpm
       192 xorg-lib-libXi-1.7.9-1.src.rpm.uploadinfo
End-TLD-Builder-Info