$ git clone -n https://src.fedoraproject.org/rpms/libvoikko.git /var/lib/mock/f45-build-17227-497/root/chroot_tmpdir/scmroot/libvoikko
Cloning into '/var/lib/mock/f45-build-17227-497/root/chroot_tmpdir/scmroot/libvoikko'...
$ git fetch origin 3a3705a6d1036bb8eacf6b4486d6743cf7ba5aa8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libvoikko
 * [new ref]         3a3705a6d1036bb8eacf6b4486d6743cf7ba5aa8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a3705a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild