$ git clone -n https://src.fedoraproject.org/rpms/ghc-x509-system.git /var/lib/mock/f40-build-777144-129247/root/chroot_tmpdir/scmroot/ghc-x509-system
Cloning into '/var/lib/mock/f40-build-777144-129247/root/chroot_tmpdir/scmroot/ghc-x509-system'...
$ git fetch origin 6d745c75596b135ad3765c1fa284e39e02c3aa65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-x509-system
 * [new ref]         6d745c75596b135ad3765c1fa284e39e02c3aa65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d745c7 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild