$ git clone -n https://src.fedoraproject.org/rpms/rubygem-logstash-event.git /var/lib/mock/f45-build-35040-693/root/chroot_tmpdir/scmroot/rubygem-logstash-event
Cloning into '/var/lib/mock/f45-build-35040-693/root/chroot_tmpdir/scmroot/rubygem-logstash-event'...
$ git fetch origin 24f68d45c51d87f65d9564b42a921d0dbf33494b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-logstash-event
 * [new ref]         24f68d45c51d87f65d9564b42a921d0dbf33494b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24f68d4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild