$ git clone -n https://src.fedoraproject.org/rpms/freedv.git /var/lib/mock/f45-build-9239-400/root/chroot_tmpdir/scmroot/freedv
Cloning into '/var/lib/mock/f45-build-9239-400/root/chroot_tmpdir/scmroot/freedv'...
$ git fetch origin 115c49b9e00b7553a80cfb3c08fde6147e9f1928:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freedv
 * [new ref]         115c49b9e00b7553a80cfb3c08fde6147e9f1928 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 115c49b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild