Workaround "docker build giturl" requiring the url to end in ".git"

meta.jq

@@ -53,10 +53,24 @@ def pull_command:
 	end
 ;
 # input: "build" object (with "buildId" top level key)
+# output: string "giturl" ("https://github.com/docker-library/golang#commit:directory), used for "docker build giturl"
+def git_build_url:
+	.source.entry.GitRepo as $gitRepo
+	| if ($gitRepo | test("^https?://github.com/"))
+		and ($gitRepo | endswith(".git") | not) then
+			# without ".git" in the url "docker build url" fails and tries to build the html repo page as a Dockerfile
+			# https://github.com/moby/moby/blob/4f9c865eddc09da0c0cb9fe08c76b81b804093f5/builder/remotecontext/urlutil/urlutil.go#L15
+			$gitRepo + ".git"
+	else
+		$gitRepo
+	end
+	+ "#" + .source.entry.GitCommit + ":" + .source.entry.Directory
+;
+# input: "build" object (with "buildId" top level key)
 # output: string "build command" ("docker buildx build ..."), may be multiple lines, expects to run in Bash with "set -Eeuo pipefail"
 def build_command:
 	normalized_builder as $builder
-	| (.source.entry.GitRepo + "#" + .source.entry.GitCommit + ":" + .source.entry.Directory) as $buildUrl
+	| git_build_url as $buildUrl
 	| if $builder == "buildkit" then
 		[
 			(