[...]

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 38682e0... - updated to 1.0.11 (fixes CVE-2016-5407)
fatal: HEAD does not point to a branch
Available branches: master
Searching for tag auto/ti/xorg-lib-libXv-1.0.11-1...
Searching for tag auto/ti/xorg-lib-libXv-1_0_11-1...
--2017-04-13 07:26:10--  http://distfiles.pld-linux.org/distfiles/by-md5/2/1/210b6ef30dda2256d54763136faa37b9/libXv-1.0.11.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: 317921 (310K) [application/x-bzip2]
Saving to: 'libXv-1.0.11.tar.bz2'
     0K .......... .......... .......... .......... .......... 16% 1.06M 0s
    50K .......... .......... .......... .......... .......... 32% 2.07M 0s
   100K .......... .......... .......... .......... .......... 48%  107M 0s
   150K .......... .......... .......... .......... .......... 64%  410M 0s
   200K .......... .......... .......... .......... .......... 80% 2.15M 0s
   250K .......... .......... .......... .......... .......... 96%  152M 0s
   300K ..........                                            100%  201M=0.09s
2017-04-13 07:26:11 (3.24 MB/s) - 'libXv-1.0.11.tar.bz2' saved [317921/317921]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/xorg-lib-libXv-1.0.11-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 38682e0... - updated to 1.0.11 (fixes CVE-2016-5407)
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/xorg-lib-libXv-1.0.11-1
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.72301
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libXv-1.0.11
Begin-TLD-Builder-Info
Build-Time: user:0.56s sys:0.14s real:1.84s (faults io:0 non-io:90982)
Files queued for ftp:
    323339 xorg-lib-libXv-1.0.11-1.src.rpm
       193 xorg-lib-libXv-1.0.11-1.src.rpm.uploadinfo
End-TLD-Builder-Info