$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-api-data.git /var/lib/mock/f41-build-side-1-2672329-29195/root/chroot_tmpdir/scmroot/ghc-http-api-data
Cloning into '/var/lib/mock/f41-build-side-1-2672329-29195/root/chroot_tmpdir/scmroot/ghc-http-api-data'...
$ git fetch origin b69ad1d11abba392c0a02af74d3545c748975896:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-api-data
 * [new ref]         b69ad1d11abba392c0a02af74d3545c748975896 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b69ad1d https://hackage.haskell.org/package/http-api-data-0.5.1/changelog