Description of problem:
It happened after restart mockbuild process. I should terminated mockbuild for fix mistake in .spec file.

Version-Release number of selected component:
mock-3.5-2.fc38

Additional info:
reporter:       libreport-2.17.8
kernel:         6.3.0-0.rc1.20230308git63355b9884b3.17.fc39.x86_64+debug
cmdline:        /usr/bin/python3 -tt /usr/libexec/mock/mock -r fedora-rawhide-x86_64 --resultdir /home/mikhail/packaging-work/kernel/results_kernel/6.3.0/0.rc1.20230308git63355b9884b3.18.fc39 --rebuild /home/mikhail/packaging-work/kernel/kernel-6.3.0-0.rc1.20230308git63355b9884b3.18.fc39.src.rpm
cgroup:         0::/user.slice/user-1000.slice/user/app.slice/app-org.gnome.Terminal.slice/vte-spawn-40cc41c6-e34a-45ec-a00a-ca202346a6bc.scope
uid:            0
reason:         file_util.py:68:rmtree:OSError: [Errno 39] Directory not empty: '/var/lib/mock/fedora-rawhide-x86_64/root/usr/lib64/python3.11'
executable:     /usr/libexec/mock/mock
type:           Python3
package:        mock-3.5-2.fc38
runlevel:       N 5
exception_type: OSError
crash_function: rmtree
interpreter:    python3-3.11.2-1.fc39.x86_64
comment:        It happened after restart mockbuild process. I should terminated mockbuild for fix mistake in .spec file.

Truncated backtrace:
#1 [/usr/lib/python3.11/site-packages/mockbuild/file_util.py:68] rmtree
#2 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#3 [/usr/lib/python3.11/site-packages/mockbuild/file_util.py:59] rmtree
#4 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#5 [/usr/lib/python3.11/site-packages/mockbuild/file_util.py:59] rmtree
#6 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#7 [/usr/lib/python3.11/site-packages/mockbuild/file_util.py:59] rmtree
#8 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#9 [/usr/lib/python3.11/site-packages/mockbuild/file_util.py:59] rmtree
#10 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#11 [/usr/lib/python3.11/site-packages/mockbuild/buildroot.py:884] delete
#12 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#13 [/usr/lib/python3.11/site-packages/mockbuild/backend.py:97] clean
#14 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#15 [/usr/lib/python3.11/site-packages/mockbuild/rebuild.py:23] rebuild_generic
#16 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#17 [/usr/lib/python3.11/site-packages/mockbuild/rebuild.py:85] do_rebuild
#18 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#19 [/usr/libexec/mock/mock:961] run_command
#20 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#21 [/usr/libexec/mock/mock:847] main
#22 [/usr/lib/python3.11/site-packages/mockbuild/trace_decorator.py:93] trace
#23 [/usr/libexec/mock/mock:1087] <module>