$ git clone -n https://src.fedoraproject.org/rpms/libzen.git /var/lib/mock/f45-build-17319-498/root/chroot_tmpdir/scmroot/libzen
Cloning into '/var/lib/mock/f45-build-17319-498/root/chroot_tmpdir/scmroot/libzen'...
$ git fetch origin 06427add9f7460eb316c41d6f6a46fe6d7cf54ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libzen
 * [new ref]         06427add9f7460eb316c41d6f6a46fe6d7cf54ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06427ad Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild