$ git clone -n https://src.fedoraproject.org/rpms/ghc-hosc.git /var/lib/mock/f40-build-2279663-55358/root/chroot_tmpdir/scmroot/ghc-hosc
Cloning into '/var/lib/mock/f40-build-2279663-55358/root/chroot_tmpdir/scmroot/ghc-hosc'...
$ git fetch origin 6590a8163e70ebf6b112293613a4c067f2b0357c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hosc
 * [new ref]         6590a8163e70ebf6b112293613a4c067f2b0357c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6590a81 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild