Your package libiscsi failed to build from source in current F28. https://koji.fedoraproject.org/koji/taskinfo?taskID=24812162 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
libiscsi-1.18.0-3.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-ea9ace8675
libiscsi-1.18.0-3.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-ea9ace8675
libiscsi-1.18.0-3.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.
There has been at least one successfull build after mass rebuild. libiscsi-1.18.0-3.fc28: https://koji.fedoraproject.org/koji/buildinfo?buildID=1061791