$ git clone -n https://src.fedoraproject.org/rpms/jaxb-dtd-parser.git /var/lib/mock/f39-build-1567797-37600/root/chroot_tmpdir/scmroot/jaxb-dtd-parser
Cloning into '/var/lib/mock/f39-build-1567797-37600/root/chroot_tmpdir/scmroot/jaxb-dtd-parser'...
$ git fetch origin 8f13921c1c4354dca099a9b9556b75e63f92794c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jaxb-dtd-parser
 * [new ref]         8f13921c1c4354dca099a9b9556b75e63f92794c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f13921 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild