$ git clone -n https://src.fedoraproject.org/rpms/perl-Math-Factor-XS.git /var/lib/mock/f31-build-67048-29976/root/chroot_tmpdir/scmroot/perl-Math-Factor-XS
Cloning into '/var/lib/mock/f31-build-67048-29976/root/chroot_tmpdir/scmroot/perl-Math-Factor-XS'...
$ git reset --hard f5dca2bde83fc546123d606e7cf061b58301b88c
HEAD is now at f5dca2b - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild