$ git clone -n https://src.fedoraproject.org/rpms/arch-test.git /var/lib/mock/f40-build-2338092-59582/root/chroot_tmpdir/scmroot/arch-test
Cloning into '/var/lib/mock/f40-build-2338092-59582/root/chroot_tmpdir/scmroot/arch-test'...
$ git fetch origin 820bf67e3205f778d3f54806a80d25ec0a8e988c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arch-test
 * [new ref]         820bf67e3205f778d3f54806a80d25ec0a8e988c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 820bf67 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild