$ git clone -n https://src.fedoraproject.org/rpms/jaxb-dtd-parser.git /var/lib/mock/f40-build-2386814-60496/root/chroot_tmpdir/scmroot/jaxb-dtd-parser
Cloning into '/var/lib/mock/f40-build-2386814-60496/root/chroot_tmpdir/scmroot/jaxb-dtd-parser'...
$ git fetch origin 912b31a59058bd454eea41e81b6d2de5be18d037:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jaxb-dtd-parser
 * [new ref]         912b31a59058bd454eea41e81b6d2de5be18d037 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 912b31a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild