$ git clone -n https://src.fedoraproject.org/rpms/ghc-BoundedChan.git /var/lib/mock/f41-build-856530-167656/root/chroot_tmpdir/scmroot/ghc-BoundedChan
Cloning into '/var/lib/mock/f41-build-856530-167656/root/chroot_tmpdir/scmroot/ghc-BoundedChan'...
$ git fetch origin b2feb0c0763d125d57278a9140937cdfff4f9908:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-BoundedChan
 * [new ref]         b2feb0c0763d125d57278a9140937cdfff4f9908 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2feb0c Fix missing entry in `sources` and `.gitignore` files.