$ git clone -n https://src.fedoraproject.org/rpms/ghc-cairo.git /var/lib/mock/f41-build-839299-160118/root/chroot_tmpdir/scmroot/ghc-cairo
Cloning into '/var/lib/mock/f41-build-839299-160118/root/chroot_tmpdir/scmroot/ghc-cairo'...
$ git fetch origin 05939b2d9968d8afa0653db223bf1e6f2e3b22ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cairo
 * [new ref]         05939b2d9968d8afa0653db223bf1e6f2e3b22ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05939b2 https://hackage.haskell.org/package/cairo-0.13.11.0/changelog