$ git clone -n https://src.fedoraproject.org/rpms/rubygem-cairo.git /var/lib/mock/f31-build-50867-27442/root/chroot_tmpdir/scmroot/rubygem-cairo
Cloning into '/var/lib/mock/f31-build-50867-27442/root/chroot_tmpdir/scmroot/rubygem-cairo'...
$ git reset --hard f69ed12c5ef23f1e7f8d0227f6370e8e9fdc8098
HEAD is now at f69ed12 Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild