$ git clone -n https://src.fedoraproject.org/rpms/octave-doctest.git /var/lib/mock/f45-build-20838-574/root/chroot_tmpdir/scmroot/octave-doctest
Cloning into '/var/lib/mock/f45-build-20838-574/root/chroot_tmpdir/scmroot/octave-doctest'...
$ git fetch origin db3535fd65ac704ac3ea7fd712587c4a497a169c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-doctest
 * [new ref]         db3535fd65ac704ac3ea7fd712587c4a497a169c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db3535f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild