[...]

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 0e5ccdd... - autotools BRs
error: HEAD does not point to a branch
fatal: @{u} - not something we can merge
Available branches: master
--2014-10-08 08:44:49--  http://distfiles.pld-linux.org/distfiles/by-md5/6/5/650266b18b2516d32a5a0aa8027e06d3/libiscsi-1.10.0.tar.gz
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: 231807 (226K) [application/x-gzip]
Saving to: 'libiscsi-1.10.0.tar.gz'
     0K .......... .......... .......... .......... .......... 22%  139K 1s
    50K .......... .......... .......... .......... .......... 44%  167K 1s
   100K .......... .......... .......... .......... .......... 66%  129K 1s
   150K .......... .......... .......... .......... .......... 88%  139K 0s
   200K .......... .......... ......                          100%  126K=1.6s
2014-10-08 08:44:51 (140 KB/s) - 'libiscsi-1.10.0.tar.gz' saved [231807/231807]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libiscsi-1.10.0-2.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 0e5ccdd... - autotools BRs
error: HEAD does not point to a branch
fatal: @{u} - not something we can merge
Writing git revision for tag auto/ti/libiscsi-1.10.0-2
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 PATH=/bin:/usr/bin:/usr/sbin:/sbin:/usr/X11R6/bin HOME=/home/users/builder TMPDIR=/home/users/builder/tmp  /bin/sh -e /home/users/builder/tmp/rpm-tmp.53368
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libiscsi-1.10.0
Begin-PLD-Builder-Info
Build-Time: user:3.18s sys:1.21s real:8.10s (faults io:66 non-io:158627)
Files queued for ftp:
    236209 libiscsi-1.10.0-2.src.rpm
       187 libiscsi-1.10.0-2.src.rpm.uploadinfo
End-PLD-Builder-Info