$ git clone -n https://src.fedoraproject.org/rpms/rubygem-thread_order.git /var/lib/mock/f45-build-35385-695/root/chroot_tmpdir/scmroot/rubygem-thread_order
Cloning into '/var/lib/mock/f45-build-35385-695/root/chroot_tmpdir/scmroot/rubygem-thread_order'...
$ git fetch origin f9d7e61f7719294e43fad05e33ad85232ec5932d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-thread_order
 * [new ref]         f9d7e61f7719294e43fad05e33ad85232ec5932d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9d7e61 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild