[...]

h vidstab vmaf vpx wavpack webp x264 x265 zimg zmq zvbi
Writing git revision for tag auto/ti/ffmpeg-4.2.1-2
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.46069
+ umask 022
+ cd /home/users/builder/rpm/BUILD
+ rm -rf ffmpeg-4.2.1
Begin-TLD-Builder-Info
Build-Time: user:1.32s sys:0.23s real:1.75s (faults io:0 non-io:91996)
Files queued for ftp:
   9108693 ffmpeg-4.2.1-2.src.rpm
       184 ffmpeg-4.2.1-2.src.rpm.uploadinfo
End-TLD-Builder-Info