$ git clone -n https://src.fedoraproject.org/rpms/ghc-haddock-library.git /var/lib/mock/f38-build-side-42-init-devel-959271-28787/root/chroot_tmpdir/scmroot/ghc-haddock-library
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-959271-28787/root/chroot_tmpdir/scmroot/ghc-haddock-library'...
$ git fetch origin 0cfbe715515115918cfc39b818335cfd3b284a74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haddock-library
 * [new ref]         0cfbe715515115918cfc39b818335cfd3b284a74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cfbe71 Convert to %autorelease and %autochangelog