Do not set root with not copying default

grubby-bls

@@ -827,13 +827,16 @@ fi
 remove_var_prefix "$(get_prefix)"
 
 if [[ -n $kernel ]]; then
+    if [[ $copy_default = "true" ]]; then
 	opts="${bls_options[$default_index]}"
-    if [[ $copy_default != "true" ]]; then
-        opts=$(echo $opts | sed -e 's/ .*//')
-    fi
 	if [[ -n $args ]]; then
 	    opts="${opts} ${args}"
 	fi
+    else
+	opts="${opts} ${args}"
+	remove_args="$kernelopts"
+	update_args "${opts}" "${remove_args}" ""
+    fi
 
     add_bls_fragment "${kernel}" "${title}" "${opts}" "${initrd}" \
                      "${extra_initrd}"

grubby.spec

@@ -1,6 +1,6 @@
 Name: grubby
 Version: 8.40
-Release: 62%{?dist}
+Release: 63%{?dist}
 Summary: Command line tool for updating bootloader configs
 License: GPLv2+
 URL: https://github.com/rhinstaller/grubby
@@ -131,6 +131,10 @@ current boot environment.
 %{_mandir}/man8/*.8*
 
 %changelog
+* Tue Feb 21 2023 Marta Lewandowska <mlewando@redhat.com> - 8.40-63
+- remove root= when not copying default
+- Resolves: #2127453
+
 * Wed Feb 15 2022 Robbie Harwood <rharwood@redhat.com> - 8.40-62
 - Apply Marta's default args fix
 - Resolves: #2127453