[...]

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 fd3ce0c... - updated to 1.4.7 - removed obsolete xserver-1.19 patch
fatal: HEAD does not point to a branch
Available branches: master
Searching for tag auto/ti/xorg-driver-video-tdfx-1.4.7-1...
Searching for tag auto/ti/xorg-driver-video-tdfx-1_4_7-1...
--2018-03-15 09:19:56--  http://distfiles.pld-linux.org/distfiles/by-md5/a/7/a7ba739c9e22ee6071750306cbac0b72/xf86-video-tdfx-1.4.7.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: 372249 (364K) [application/x-bzip2]
Saving to: 'xf86-video-tdfx-1.4.7.tar.bz2'
     0K .......... .......... .......... .......... .......... 13% 1.23M 0s
    50K .......... .......... .......... .......... .......... 27% 2.42M 0s
   100K .......... .......... .......... .......... .......... 41%  164M 0s
   150K .......... .......... .......... .......... .......... 55% 64.4M 0s
   200K .......... .......... .......... .......... .......... 68% 2.52M 0s
   250K .......... .......... .......... .......... .......... 82% 96.9M 0s
   300K .......... .......... .......... .......... .......... 96% 87.7M 0s
   350K .......... ...                                        100%  138M=0.08s
2018-03-15 09:19:56 (4.35 MB/s) - 'xf86-video-tdfx-1.4.7.tar.bz2' saved [372249/372249]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/xorg-driver-video-tdfx-1.4.7-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at fd3ce0c... - updated to 1.4.7 - removed obsolete xserver-1.19 patch
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/xorg-driver-video-tdfx-1.4.7-1
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.53216
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf xf86-video-tdfx-1.4.7
Begin-TLD-Builder-Info
Build-Time: user:0.52s sys:0.11s real:2.05s (faults io:0 non-io:91864)
Files queued for ftp:
    377806 xorg-driver-video-tdfx-1.4.7-1.src.rpm
       200 xorg-driver-video-tdfx-1.4.7-1.src.rpm.uploadinfo
End-TLD-Builder-Info