$ git clone -n https://src.fedoraproject.org/rpms/python-BTrees.git /var/lib/mock/f33-build-233113-50407/root/chroot_tmpdir/scmroot/python-BTrees
Cloning into '/var/lib/mock/f33-build-233113-50407/root/chroot_tmpdir/scmroot/python-BTrees'...
$ git reset --hard be094d33c67e849926ca672de26fb56becec3b4e
HEAD is now at be094d3 Rebuilt for Python 3.9