$ git clone -n https://src.fedoraproject.org/rpms/fftw2.git /var/lib/mock/f31-build-50403-27410/root/chroot_tmpdir/scmroot/fftw2
Cloning into '/var/lib/mock/f31-build-50403-27410/root/chroot_tmpdir/scmroot/fftw2'...
$ git reset --hard febe48fa24e274c2d6b0c596b505902dbf1120d4
HEAD is now at febe48f - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild