$ git clone -n https://src.fedoraproject.org/rpms/ghc-bitwise.git /var/lib/mock/f41-build-855831-167429/root/chroot_tmpdir/scmroot/ghc-bitwise
Cloning into '/var/lib/mock/f41-build-855831-167429/root/chroot_tmpdir/scmroot/ghc-bitwise'...
$ git fetch origin cb48b572b40b186cc20fb9d6e57d17cf555b7019:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-bitwise
 * [new ref]         cb48b572b40b186cc20fb9d6e57d17cf555b7019 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb48b57 Fix missing entry in `.gitignore` files.