[...]

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 205932b... - updated to 1.2.0 (now uses libXfont2)
fatal: HEAD does not point to a branch
Available branches: AC-branch RA-branch RA-branch-security djrzulf-XFree86-4_3_0 master
Searching for tag auto/ti/xorg-app-xfs-1.2.0-1...
Searching for tag auto/ti/xorg-app-xfs-1_2_0-1...
--2018-03-12 16:02:17--  http://distfiles.pld-linux.org/distfiles/by-md5/b/4/b4d2e644bfb35cae8858d2411501b07e/xfs-1.2.0.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: 233957 (228K) [application/x-bzip2]
Saving to: 'xfs-1.2.0.tar.bz2'
     0K .......... .......... .......... .......... .......... 21% 1.20M 0s
    50K .......... .......... .......... .......... .......... 43% 2.38M 0s
   100K .......... .......... .......... .......... .......... 65% 43.7M 0s
   150K .......... .......... .......... .......... .......... 87%  156M 0s
   200K .......... .......... ........                        100% 1.47M=0.08s
2018-03-12 16:02:17 (2.74 MB/s) - 'xfs-1.2.0.tar.bz2' saved [233957/233957]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/xorg-app-xfs-1.2.0-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 205932b... - updated to 1.2.0 (now uses libXfont2)
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/xorg-app-xfs-1.2.0-1
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.82934
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf xfs-1.2.0
Begin-TLD-Builder-Info
Build-Time: user:0.98s sys:0.34s real:2.61s (faults io:0 non-io:124249)
Files queued for ftp:
    242821 xorg-app-xfs-1.2.0-1.src.rpm
       190 xorg-app-xfs-1.2.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info