[...]

  git checkout -b new_branch_name
HEAD is now at 3f8dd78... Merge branch 'DEVEL'
fatal: HEAD does not point to a branch
Available branches: master
Searching for tag auto/ti/userspace-rcu-0.10.0-1...
Searching for tag auto/ti/userspace-rcu-0_10_0-1...
--2018-04-14 12:22:12--  http://distfiles.pld-linux.org/distfiles/by-md5/6/9/69dab85b6929c378338b9504adc6aea7/userspace-rcu-0.10.0.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: 483899 (473K) [application/x-bzip2]
Saving to: 'userspace-rcu-0.10.0.tar.bz2'
     0K .......... .......... .......... .......... .......... 10% 1.20M 0s
    50K .......... .......... .......... .......... .......... 21% 2.40M 0s
   100K .......... .......... .......... .......... .......... 31%  147M 0s
   150K .......... .......... .......... .......... .......... 42% 67.8M 0s
   200K .......... .......... .......... .......... .......... 52% 2.28M 0s
   250K .......... .......... .......... .......... .......... 63%  109M 0s
   300K .......... .......... .......... .......... .......... 74%  179M 0s
   350K .......... .......... .......... .......... .......... 84%  185M 0s
   400K .......... .......... .......... .......... .......... 95% 2.75M 0s
   450K .......... .......... ..                              100%  132M=0.1s
2018-04-14 12:22:12 (4.51 MB/s) - 'userspace-rcu-0.10.0.tar.bz2' saved [483899/483899]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/userspace-rcu-0.10.0-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 3f8dd78... Merge branch 'DEVEL'
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/userspace-rcu-0.10.0-1
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.38884
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf userspace-rcu-0.10.0
Begin-TLD-Builder-Info
Build-Time: user:0.80s sys:0.25s real:2.12s (faults io:0 non-io:87920)
Files queued for ftp:
    490392 userspace-rcu-0.10.0-1.src.rpm
       192 userspace-rcu-0.10.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info