[...]

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 2738587... - updated to 2.3.4 - dropped xf86gtfmode (now driver requires Xserver 1.6 anyway)
fatal: HEAD does not point to a branch
Available branches: master
--2015-07-28 11:50:38--  http://distfiles.pld-linux.org/distfiles/by-md5/a/8/a893c37c589f7a31cea929a5d896a0e2/xf86-video-vesa-2.3.4.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: 285675 (279K) [application/x-bzip2]
Saving to: 'xf86-video-vesa-2.3.4.tar.bz2'
     0K .......... .......... .......... .......... .......... 17%  781K 0s
    50K .......... .......... .......... .......... .......... 35% 1.47M 0s
   100K .......... .......... .......... .......... .......... 53% 1.53M 0s
   150K .......... .......... .......... .......... .......... 71% 1.59M 0s
   200K .......... .......... .......... .......... .......... 89% 11.5M 0s
   250K .......... .......... ........                        100% 1.06M=0.2s
2015-07-28 11:50:39 (1.43 MB/s) - 'xf86-video-vesa-2.3.4.tar.bz2' saved [285675/285675]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/xorg-driver-video-vesa-2.3.4-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 2738587... - updated to 2.3.4 - dropped xf86gtfmode (now driver requires Xserver 1.6 anyway)
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/xorg-driver-video-vesa-2.3.4-1
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.70231
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf xf86-video-vesa-2.3.4
Begin-PLD-Builder-Info
Build-Time: user:2.79s sys:1.35s real:5.16s (faults io:0 non-io:192900)
Files queued for ftp:
    291022 xorg-driver-video-vesa-2.3.4-1.src.rpm
       200 xorg-driver-video-vesa-2.3.4-1.src.rpm.uploadinfo
End-PLD-Builder-Info