$ git clone -n https://src.fedoraproject.org/rpms/fftw2.git /var/lib/mock/f31-build-66710-29925/root/chroot_tmpdir/scmroot/fftw2
Cloning into '/var/lib/mock/f31-build-66710-29925/root/chroot_tmpdir/scmroot/fftw2'...
$ git reset --hard 323e4a0cb00a91f4156bbf81544144025e9102e9
HEAD is now at 323e4a0 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild