$ git clone -n https://src.fedoraproject.org/rpms/kf5-kiconthemes.git /var/lib/mock/f45-build-14843-464/root/chroot_tmpdir/scmroot/kf5-kiconthemes
Cloning into '/var/lib/mock/f45-build-14843-464/root/chroot_tmpdir/scmroot/kf5-kiconthemes'...
$ git fetch origin 5ed355daf055dff65e628678948a573c259919dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kiconthemes
 * [new ref]         5ed355daf055dff65e628678948a573c259919dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5ed355d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild