$ git clone -n https://src.fedoraproject.org/rpms/octave-struct.git /var/lib/mock/f40-build-789718-135960/root/chroot_tmpdir/scmroot/octave-struct
Cloning into '/var/lib/mock/f40-build-789718-135960/root/chroot_tmpdir/scmroot/octave-struct'...
$ git fetch origin bc00bbde735fc21f2c95fe322fcc841e4162c163:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-struct
 * [new ref]         bc00bbde735fc21f2c95fe322fcc841e4162c163 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc00bbd Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild