$ git clone -n https://src.fedoraproject.org/rpms/ghc-warp-tls.git /var/lib/mock/f41-build-840558-160785/root/chroot_tmpdir/scmroot/ghc-warp-tls
Cloning into '/var/lib/mock/f41-build-840558-160785/root/chroot_tmpdir/scmroot/ghc-warp-tls'...
$ git fetch origin 55fb1d85e8d515a79f2b2f5a630df9bc5914d76d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-warp-tls
 * [new ref]         55fb1d85e8d515a79f2b2f5a630df9bc5914d76d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55fb1d8 https://hackage.haskell.org/package/warp-tls-3.4.6/changelog