$ git clone -n https://src.fedoraproject.org/rpms/reStream.git /var/lib/mock/f38-build-side-42-init-devel-1407859-31361/root/chroot_tmpdir/scmroot/reStream
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1407859-31361/root/chroot_tmpdir/scmroot/reStream'...
$ git fetch origin 9aba362eb350993bc8b4d25c1a3409a090b9710c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/reStream
 * [new ref]         9aba362eb350993bc8b4d25c1a3409a090b9710c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9aba362 Use sed to cleanup the manpage