$ git clone -n https://src.fedoraproject.org/rpms/rubygem-pdf-inspector.git /var/lib/mock/f45-build-35149-693/root/chroot_tmpdir/scmroot/rubygem-pdf-inspector
Cloning into '/var/lib/mock/f45-build-35149-693/root/chroot_tmpdir/scmroot/rubygem-pdf-inspector'...
$ git fetch origin 610403eb75a430995ec1462282d929c2fe0002f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-pdf-inspector
 * [new ref]         610403eb75a430995ec1462282d929c2fe0002f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 610403e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild