$ git clone -n https://src.fedoraproject.org/rpms/rubygem-nio4r.git /var/lib/mock/f31-build-93644-32422/root/chroot_tmpdir/scmroot/rubygem-nio4r
Cloning into '/var/lib/mock/f31-build-93644-32422/root/chroot_tmpdir/scmroot/rubygem-nio4r'...
$ git reset --hard f31b681d747175616abe43f58cac901bfe3987af
HEAD is now at f31b681 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild