$ git clone -n https://src.fedoraproject.org/rpms/ghc-kan-extensions.git /var/lib/mock/f40-build-777212-129287/root/chroot_tmpdir/scmroot/ghc-kan-extensions
Cloning into '/var/lib/mock/f40-build-777212-129287/root/chroot_tmpdir/scmroot/ghc-kan-extensions'...
$ git fetch origin 79d29fef63b2ae5d6a7a16f5005f4de71276f43b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-kan-extensions
 * [new ref]         79d29fef63b2ae5d6a7a16f5005f4de71276f43b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79d29fe Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild