$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-Fast.git /var/lib/mock/f31-build-66652-29915/root/chroot_tmpdir/scmroot/perl-XML-Fast
Cloning into '/var/lib/mock/f31-build-66652-29915/root/chroot_tmpdir/scmroot/perl-XML-Fast'...
$ git reset --hard 6508348e3ff215dc2e0da0aa31aeddba6530c000
HEAD is now at 6508348 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild