$ git clone -n https://src.fedoraproject.org/rpms/rubygem-cucumber-wire.git /var/lib/mock/f45-build-34927-692/root/chroot_tmpdir/scmroot/rubygem-cucumber-wire
Cloning into '/var/lib/mock/f45-build-34927-692/root/chroot_tmpdir/scmroot/rubygem-cucumber-wire'...
$ git fetch origin 173cac4870f627528c67d4b6c18bec2b2d2a2660:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-cucumber-wire
 * [new ref]         173cac4870f627528c67d4b6c18bec2b2d2a2660 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 173cac4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild