$ git clone -n https://src.fedoraproject.org/rpms/swift-lang.git /var/lib/mock/f40-build-2684529-67984/root/chroot_tmpdir/scmroot/swift-lang
Cloning into '/var/lib/mock/f40-build-2684529-67984/root/chroot_tmpdir/scmroot/swift-lang'...
$ git fetch origin 7b6d93116f8b4689d3487ab1f49d2476a1650947:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/swift-lang
 * [new ref]         7b6d93116f8b4689d3487ab1f49d2476a1650947 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b6d931 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild