$ git clone -n https://src.fedoraproject.org/rpms/ghc-concurrent-extra.git /var/lib/mock/f40-build-2286085-55702/root/chroot_tmpdir/scmroot/ghc-concurrent-extra
Cloning into '/var/lib/mock/f40-build-2286085-55702/root/chroot_tmpdir/scmroot/ghc-concurrent-extra'...
$ git fetch origin ce20f62b364e3427e9b9a1eeff2711cae91d4eeb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-concurrent-extra
 * [new ref]         ce20f62b364e3427e9b9a1eeff2711cae91d4eeb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce20f62 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild