$ git clone -n https://src.fedoraproject.org/rpms/plib.git /var/lib/mock/f45-build-28687-632/root/chroot_tmpdir/scmroot/plib
Cloning into '/var/lib/mock/f45-build-28687-632/root/chroot_tmpdir/scmroot/plib'...
$ git fetch origin e918b8a43cf515121e8826d8523aac702a2d58bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plib
 * [new ref]         e918b8a43cf515121e8826d8523aac702a2d58bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e918b8a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild