Your package perl-MongoDB failed to build from source in current F28. https://koji.fedoraproject.org/koji/taskinfo?taskID=24853412 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
The koji logs does not exist anymore. According to Koschei there was a problem in Boost packages.
perl-MongoDB-1.8.1-2.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-9812edde45
perl-MongoDB-1.8.1-2.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-9812edde45
perl-MongoDB-1.8.1-2.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.