$ git clone -n https://src.fedoraproject.org/rpms/immix.git /var/lib/mock/f40-build-2241071-53660/root/chroot_tmpdir/scmroot/immix
Cloning into '/var/lib/mock/f40-build-2241071-53660/root/chroot_tmpdir/scmroot/immix'...
$ git fetch origin d1b1a85ee2d7eb97f423974aea05025fa8b58c64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/immix
 * [new ref]         d1b1a85ee2d7eb97f423974aea05025fa8b58c64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1b1a85 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild