[...]

  git checkout -b <new-branch-name>
HEAD is now at 0085029 - updated to 1.7.0 (note: new soname)
fatal: HEAD does not point to a branch
Available branches: AC-branch hunspell-1.3 master
Searching for tag auto/ti/hunspell-1.7.0-1...
Searching for tag auto/ti/hunspell-1_7_0-1...
--2019-08-28 18:35:12--  http://distfiles.pld-linux.org/by-md5/b/2/b2399a4aa927e8b3e171d9ea6737cc02/hunspell-1.7.0.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: 482156 (471K) [application/x-gzip]
Saving to: 'hunspell-1.7.0.tar.gz'
     0K .......... .......... .......... .......... .......... 10%  613K 1s
    50K .......... .......... .......... .......... .......... 21% 1.20M 0s
   100K .......... .......... .......... .......... .......... 31%  392M 0s
   150K .......... .......... .......... .......... .......... 42% 36.3M 0s
   200K .......... .......... .......... .......... .......... 53% 1.24M 0s
   250K .......... .......... .......... .......... .......... 63% 32.3M 0s
   300K .......... .......... .......... .......... .......... 74% 72.7M 0s
   350K .......... .......... .......... .......... .......... 84% 35.1M 0s
   400K .......... .......... .......... .......... .......... 95% 1.32M 0s
   450K .......... ..........                                 100%  310M=0.2s
2019-08-28 18:35:12 (2.25 MB/s) - 'hunspell-1.7.0.tar.gz' saved [482156/482156]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/hunspell-1.7.0-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 0085029 - updated to 1.7.0 (note: new soname)
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/hunspell-1.7.0-1
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.76907
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf hunspell-1.7.0
Begin-TLD-Builder-Info
Build-Time: user:0.63s sys:0.09s real:2.40s (faults io:0 non-io:103097)
Files queued for ftp:
    429775 hunspell-1.7.0-1.src.rpm
       186 hunspell-1.7.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info