$ git clone -n https://src.fedoraproject.org/rpms/perl-Object-Event.git /var/lib/mock/f45-build-25485-611/root/chroot_tmpdir/scmroot/perl-Object-Event
Cloning into '/var/lib/mock/f45-build-25485-611/root/chroot_tmpdir/scmroot/perl-Object-Event'...
$ git fetch origin e50de7e1392377108788afbe2d223fefc696db9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Object-Event
 * [new ref]         e50de7e1392377108788afbe2d223fefc696db9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e50de7e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild