$ git clone -n https://src.fedoraproject.org/rpms/ghc-servant-foreign.git /var/lib/mock/f41-build-side-1-2883177-34500/root/chroot_tmpdir/scmroot/ghc-servant-foreign
Cloning into '/var/lib/mock/f41-build-side-1-2883177-34500/root/chroot_tmpdir/scmroot/ghc-servant-foreign'...
$ git fetch origin 7e07e217d270745d8bc905c59935b753273095fd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-servant-foreign
 * [new ref]         7e07e217d270745d8bc905c59935b753273095fd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e07e21 https://hackage.haskell.org/package/servant-foreign-0.16/changelog