$ git clone -n https://src.fedoraproject.org/rpms/ghc-streaming-commons.git /var/lib/mock/f41-build-side-1-2883201-34500/root/chroot_tmpdir/scmroot/ghc-streaming-commons
Cloning into '/var/lib/mock/f41-build-side-1-2883201-34500/root/chroot_tmpdir/scmroot/ghc-streaming-commons'...
$ git fetch origin 565486f2b22fec3324be909080f3a1ab74ba7cc6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-streaming-commons
 * [new ref]         565486f2b22fec3324be909080f3a1ab74ba7cc6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 565486f revise .cabal file