$ git clone -n https://src.fedoraproject.org/rpms/ghc-path.git /var/lib/mock/f41-build-840182-160595/root/chroot_tmpdir/scmroot/ghc-path
Cloning into '/var/lib/mock/f41-build-840182-160595/root/chroot_tmpdir/scmroot/ghc-path'...
$ git fetch origin cf2477ef4393e7499b3627a39d8833e05de3ced1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-path
 * [new ref]         cf2477ef4393e7499b3627a39d8833e05de3ced1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf2477e https://hackage.haskell.org/package/path-0.9.5/changelog