$ git clone -n https://src.fedoraproject.org/rpms/jaxb-stax-ex.git /var/lib/mock/f40-build-2275245-55067/root/chroot_tmpdir/scmroot/jaxb-stax-ex
Cloning into '/var/lib/mock/f40-build-2275245-55067/root/chroot_tmpdir/scmroot/jaxb-stax-ex'...
$ git fetch origin 5efa95cfb9456a43a28c328d511effcc3a3d27d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jaxb-stax-ex
 * [new ref]         5efa95cfb9456a43a28c328d511effcc3a3d27d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5efa95c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild