$ git clone -n https://src.fedoraproject.org/rpms/python-BTrees.git /var/lib/mock/f31-build-47170-26793/root/chroot_tmpdir/scmroot/python-BTrees
Cloning into '/var/lib/mock/f31-build-47170-26793/root/chroot_tmpdir/scmroot/python-BTrees'...
$ git reset --hard 5b089e59ae441fbc4e9cf7b5849041832cbc70e5
HEAD is now at 5b089e5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild