$ git clone -n https://src.fedoraproject.org/rpms/rubygem-opengl.git /var/lib/mock/f31-build-93651-32424/root/chroot_tmpdir/scmroot/rubygem-opengl
Cloning into '/var/lib/mock/f31-build-93651-32424/root/chroot_tmpdir/scmroot/rubygem-opengl'...
$ git reset --hard a9b1e0b2cfacf1a1cfa4bbd2322a7530632e4f89
HEAD is now at a9b1e0b - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild