[...]

  git checkout -b <new-branch-name>
HEAD is now at 42a196a - rebuild with libidn2 2.1.0 - release 5 (by relup.sh)
fatal: HEAD does not point to a branch
Available branches: master
Searching for tag auto/ti/pkcs11-helper-1.23-5...
Searching for tag auto/ti/pkcs11-helper-1_23-5...
--2019-02-25 10:43:13--  http://distfiles.pld-linux.org/by-md5/1/6/1670f2607b746424dadb3b833861d0b0/pkcs11-helper-1.23.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: 425238 (415K) [application/x-bzip2]
Saving to: 'pkcs11-helper-1.23.tar.bz2'
     0K .......... .......... .......... .......... .......... 12%  613K 1s
    50K .......... .......... .......... .......... .......... 24% 1.19M 0s
   100K .......... .......... .......... .......... .......... 36% 70.7M 0s
   150K .......... .......... .......... .......... .......... 48% 32.4M 0s
   200K .......... .......... .......... .......... .......... 60% 1.26M 0s
   250K .......... .......... .......... .......... .......... 72% 41.2M 0s
   300K .......... .......... .......... .......... .......... 84% 69.9M 0s
   350K .......... .......... .......... .......... .......... 96%  165M 0s
   400K .......... .....                                      100%  307M=0.2s
2019-02-25 10:43:13 (2.45 MB/s) - 'pkcs11-helper-1.23.tar.bz2' saved [425238/425238]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/pkcs11-helper-1.23-5.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at 42a196a - rebuild with libidn2 2.1.0 - release 5 (by relup.sh)
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/pkcs11-helper-1.23-5
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.586
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf pkcs11-helper-1.23
Begin-TLD-Builder-Info
Build-Time: user:0.77s sys:0.08s real:3.61s (faults io:29 non-io:106110)
Files queued for ftp:
    431264 pkcs11-helper-1.23-5.src.rpm
       190 pkcs11-helper-1.23-5.src.rpm.uploadinfo
End-TLD-Builder-Info