diff --git a/builder/remotecontext/urlutil/urlutil.go b/builder/remotecontext/urlutil/urlutil.go
index e38988a30c..e8459cc820 100644
--- a/builder/remotecontext/urlutil/urlutil.go
+++ b/builder/remotecontext/urlutil/urlutil.go
@@ -12,7 +12,7 @@ import (
 
 // urlPathWithFragmentSuffix matches fragments to use as Git reference and build
 // context from the Git repository. See IsGitURL for details.
-var urlPathWithFragmentSuffix = regexp.MustCompile(".git(?:#.+)?$")
+var urlPathWithFragmentSuffix = regexp.MustCompile(`\.git(?:#.+)?$`)
 
 // IsURL returns true if the provided str is an HTTP(S) URL by checking if it
 // has a http:// or https:// scheme. No validation is performed to verify if the
diff --git a/builder/remotecontext/urlutil/urlutil_test.go b/builder/remotecontext/urlutil/urlutil_test.go
index 6906118321..ed39f5f22e 100644
--- a/builder/remotecontext/urlutil/urlutil_test.go
+++ b/builder/remotecontext/urlutil/urlutil_test.go
@@ -17,6 +17,7 @@ var (
 	}
 	invalidGitUrls = []string{
 		"http://github.com/docker/docker.git:#branch",
+		"https://github.com/docker/dgit",
 	}
 )