$ git clone -n https://src.fedoraproject.org/rpms/ghc-generic-deriving.git /var/lib/mock/f40-build-2292566-56143/root/chroot_tmpdir/scmroot/ghc-generic-deriving
Cloning into '/var/lib/mock/f40-build-2292566-56143/root/chroot_tmpdir/scmroot/ghc-generic-deriving'...
$ git fetch origin 637df287e2dd18076bd691ce171829ac51790dac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-generic-deriving
 * [new ref]         637df287e2dd18076bd691ce171829ac51790dac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 637df28 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild