$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-BigInt-FastCalc.git /var/lib/mock/f31-build-67026-29972/root/chroot_tmpdir/scmroot/perl-Math-BigInt-FastCalc
Cloning into '/var/lib/mock/f31-build-67026-29972/root/chroot_tmpdir/scmroot/perl-Math-BigInt-FastCalc'...
$ git reset --hard 23450e81cda4e45e1d6fcebc6729937ae1a42522
HEAD is now at 23450e8 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild