$ git clone -n https://src.fedoraproject.org/rpms/xcalib.git /var/lib/mock/f31-build-60781-28781/root/chroot_tmpdir/scmroot/xcalib
Cloning into '/var/lib/mock/f31-build-60781-28781/root/chroot_tmpdir/scmroot/xcalib'...
$ git reset --hard b537490b3923a90d44bb5b8f9573375c787bdc58
HEAD is now at b537490 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild