$ git clone -n https://src.fedoraproject.org/rpms/octave-struct.git /var/lib/mock/f45-build-20831-574/root/chroot_tmpdir/scmroot/octave-struct
Cloning into '/var/lib/mock/f45-build-20831-574/root/chroot_tmpdir/scmroot/octave-struct'...
$ git fetch origin e04bf79de85fe60b89ab41016c41ed1d2daaf387:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-struct
 * [new ref]         e04bf79de85fe60b89ab41016c41ed1d2daaf387 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e04bf79 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild