[...]

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 a93d46a... - updated to 0.2.10
fatal: HEAD does not point to a branch
Available branches: master
Searching for tag auto/ti/libdatrie-0.2.10-1...
Searching for tag auto/ti/libdatrie-0_2_10-1...
--2018-04-07 13:13:27--  http://distfiles.pld-linux.org/distfiles/by-md5/2/2/22d4fca2a09c58584a461b115d3d57f1/libdatrie-0.2.10.tar.xz
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: 294380 (287K) [application/octet-stream]
Saving to: 'libdatrie-0.2.10.tar.xz'
     0K .......... .......... .......... .......... .......... 17% 1.21M 0s
    50K .......... .......... .......... .......... .......... 34% 2.39M 0s
   100K .......... .......... .......... .......... .......... 52% 65.3M 0s
   150K .......... .......... .......... .......... .......... 69% 1.20M 0s
   200K .......... .......... .......... .......... .......... 86%  179M 0s
   250K .......... .......... .......... .......              100%  148M=0.1s
2018-04-07 13:13:28 (2.73 MB/s) - 'libdatrie-0.2.10.tar.xz' saved [294380/294380]
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libdatrie-0.2.10-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at a93d46a... - updated to 0.2.10
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/libdatrie-0.2.10-1
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.837
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf libdatrie-0.2.10
Begin-TLD-Builder-Info
Build-Time: user:0.97s sys:0.27s real:2.77s (faults io:0 non-io:84762)
Files queued for ftp:
    300118 libdatrie-0.2.10-1.src.rpm
       188 libdatrie-0.2.10-1.src.rpm.uploadinfo
End-TLD-Builder-Info