diff --git a/tools/tools/git/mfc-candidates.lua b/tools/tools/git/mfc-candidates.lua
--- a/tools/tools/git/mfc-candidates.lua
+++ b/tools/tools/git/mfc-candidates.lua
@@ -117,41 +117,17 @@
 
 local function usage(from_branch, to_branch, author)
 	local script_name = arg[0]:match("([^/]+)$")
-	print(script_name .. " [-ah] [-f from_branch] [-t to_branch] [-u user] [-X exclude_file] [path ...]")
+	print(script_name .. " [-ah] [-f from_branch] [-r remote] [-t to_branch] [-u user] [-X exclude_file] [path ...]")
 	print()
 	params(from_branch, to_branch, author)
 end
 
 -- Main function
 local function main()
-	local from_branch = "freebsd/main"
-	local to_branch = ""
+	local remote = "freebsd"
 	local author = os.getenv("USER") or ""
 	local dirspec = nil
 
-	local url = exec_command("git remote get-url freebsd")
-	local freebsd_repo = string.match(url, "[^/]+$")
-	freebsd_repo = string.gsub(freebsd_repo, ".git$", "")
-	if freebsd_repo == "ports" or freebsd_repo == "freebsd-ports" then
-		local year = os.date("%Y")
-		local month = os.date("%m")
-		local qtr = math.ceil(month / 3)
-		to_branch = "freebsd/" .. year .. "Q" .. qtr
-	elseif freebsd_repo == "src" or freebsd_repo == "freebsd-src" then
-		to_branch = "freebsd/stable/14"
-		-- If pwd is a stable or release branch tree, default to it.
-		local cur_branch = exec_command("git symbolic-ref --short HEAD")
-		if string.match(cur_branch, "^stable/") then
-			to_branch = cur_branch
-		elseif string.match(cur_branch, "^releng/") then
-			to_branch = cur_branch
-			local major = string.match(cur_branch, "%d+")
-			from_branch = "freebsd/stable/" .. major
-		end
-	else
-		print("pwd is not under a ports or src repository.")
-		return
-	end
 
 	local do_help = false
 	local exclude_file = nil
@@ -166,6 +142,9 @@
 		elseif opt == "-h" then
 			do_help = true
 			i = i + 1
+		elseif opt == "-r" then
+			remote = arg[i + 1]
+			i = i + 1
 		elseif opt == "-t" then
 			to_branch = arg[i + 1]
 			i = i + 1
@@ -183,6 +162,32 @@
 		i = i + 1
 	end
 
+	local from_branch = remote .. "/main"
+	local to_branch = ""
+	local url = exec_command("git remote get-url " .. remote)
+	local freebsd_repo = string.match(url, "[^/^:]+$")
+	freebsd_repo = string.gsub(freebsd_repo, ".git$", "")
+	if freebsd_repo == "ports" or freebsd_repo == "freebsd-ports" then
+		local year = os.date("%Y")
+		local month = os.date("%m")
+		local qtr = math.ceil(month / 3)
+		to_branch = remote .. "/" .. year .. "Q" .. qtr
+	elseif freebsd_repo == "src" or freebsd_repo == "freebsd-src" then
+		to_branch = remote .. "/stable/14"
+		-- If pwd is a stable or release branch tree, default to it.
+		local cur_branch = exec_command("git symbolic-ref --short HEAD")
+		if string.match(cur_branch, "^stable/") then
+			to_branch = cur_branch
+		elseif string.match(cur_branch, "^releng/") then
+			to_branch = cur_branch
+			local major = string.match(cur_branch, "%d+")
+			from_branch = remote .. "/stable/" .. major
+		end
+	else
+		print("pwd is not under a ports or src repository.")
+		return
+	end
+
 	if do_help then
 		usage(from_branch, to_branch, author)
 		return