$ git clone -n https://src.fedoraproject.org/rpms/extrema.git /var/lib/mock/f40-build-2347328-60094/root/chroot_tmpdir/scmroot/extrema
Cloning into '/var/lib/mock/f40-build-2347328-60094/root/chroot_tmpdir/scmroot/extrema'...
$ git fetch origin 95f084b80bbd8407d1e5dc218bb59568c762ed3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/extrema
 * [new ref]         95f084b80bbd8407d1e5dc218bb59568c762ed3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 95f084b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild