[...]

Or undo this operation with:
  git switch -
Turn off this advice by setting config variable advice.detachedHead to false
HEAD is now at d6ffe3a - initial - dirs patch allows to specify arch-dependent libdir - xchat-gtk2 switches xchat plugin to use glib 2.x headers (instead of 1.x)
fatal: HEAD does not point to a branch
Available branches: master
Searching for tag auto/ti/zh-autoconvert-0.3.16-1...
Searching for tag auto/ti/zh-autoconvert-0_3_16-1...
--2020-04-05 21:12:47--  http://distfiles.pld-linux.org/by-md5/1/f/1f4aa2332afc076910b5d510b8c81966/zh-autoconvert_0.3.16.orig.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: 275360 (269K) [application/x-gzip]
Saving to: 'zh-autoconvert_0.3.16.orig.tar.gz'
     0K .......... .......... .......... .......... .......... 18% 1.30M 0s
    50K .......... .......... .......... .......... .......... 37% 2.61M 0s
   100K .......... .......... .......... .......... .......... 55%  232M 0s
   150K .......... .......... .......... .......... .......... 74% 68.5M 0s
   200K .......... .......... .......... .......... .......... 92% 2.68M 0s
   250K .......... ........                                   100%  211M=0.08s
2020-04-05 21:12:47 (3.48 MB/s) - 'zh-autoconvert_0.3.16.orig.tar.gz' saved [275360/275360]
warning: Could not canonicalize hostname: giant
Building target platforms: i686-linux
Wrote: /home/users/builder/rpm/SRPMS/zh-autoconvert-0.3.16-1.src.rpm
exit status 0
Tagging with prefix: auto/ti/
HEAD is now at d6ffe3a - initial - dirs patch allows to specify arch-dependent libdir - xchat-gtk2 switches xchat plugin to use glib 2.x headers (instead of 1.x)
fatal: HEAD does not point to a branch
Writing git revision for tag auto/ti/zh-autoconvert-0.3.16-1
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.85305
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf autoconvert-0.3.16
Begin-TLD-Builder-Info
Build-Time: user:0.86s sys:0.32s real:1.85s (faults io:0 non-io:87128)
Files queued for ftp:
    276076 zh-autoconvert-0.3.16-1.src.rpm
       193 zh-autoconvert-0.3.16-1.src.rpm.uploadinfo
End-TLD-Builder-Info