$ git clone -n https://src.fedoraproject.org/rpms/ghc-hackage-security.git /var/lib/mock/f38-build-side-42-init-devel-880135-28485/root/chroot_tmpdir/scmroot/ghc-hackage-security
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-880135-28485/root/chroot_tmpdir/scmroot/ghc-hackage-security'...
$ git fetch origin 2d1ea8161a54e354bea65f51ca3997e4e679e6aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hackage-security
 * [new ref]         2d1ea8161a54e354bea65f51ca3997e4e679e6aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d1ea81 do not require ghc-Cabal-syntax-prof either