$ git clone -n https://src.fedoraproject.org/rpms/octave-quaternion.git /var/lib/mock/f42-build-3279779-41338/root/chroot_tmpdir/scmroot/octave-quaternion
Cloning into '/var/lib/mock/f42-build-3279779-41338/root/chroot_tmpdir/scmroot/octave-quaternion'...
$ git fetch origin b758321575f0cc91b904209b1d1c818397ea05d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-quaternion
 * [new ref]         b758321575f0cc91b904209b1d1c818397ea05d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b758321 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild