diff --git a/pkg/commands/git.go b/pkg/commands/git.go
index 05d42b433..3599f7b39 100644
--- a/pkg/commands/git.go
+++ b/pkg/commands/git.go
@@ -453,15 +453,7 @@ func (c *GitCommand) usingGpg() bool {
 func (c *GitCommand) Commit(message string, flags string) (*exec.Cmd, error) {
 	command := fmt.Sprintf("git commit %s -m %s", flags, c.OSCommand.Quote(message))
 	if c.usingGpg() {
-		quotedCommand := ""
-		// Windows does not seem to like quotes around the command
-		if c.OSCommand.Platform.os == "windows" {
-			quotedCommand = command
-		} else {
-			quotedCommand = c.OSCommand.Quote(command)
-		}
-
-		return c.OSCommand.ExecutableFromString(fmt.Sprintf("%s %s %s", c.OSCommand.Platform.shell, c.OSCommand.Platform.shellArg, quotedCommand)), nil
+		return c.OSCommand.ShellCommandFromString(command), nil
 	}
 
 	return nil, c.OSCommand.RunCommand(command)
@@ -478,15 +470,7 @@ func (c *GitCommand) GetHeadCommitMessage() (string, error) {
 func (c *GitCommand) AmendHead() (*exec.Cmd, error) {
 	command := "git commit --amend --no-edit --allow-empty"
 	if c.usingGpg() {
-		quotedCommand := ""
-		// Windows does not seem to like quotes around the command
-		if c.OSCommand.Platform.os == "windows" {
-			quotedCommand = command
-		} else {
-			quotedCommand = c.OSCommand.Quote(command)
-		}
-
-		return c.OSCommand.ExecutableFromString(fmt.Sprintf("%s %s %s", c.OSCommand.Platform.shell, c.OSCommand.Platform.shellArg, quotedCommand)), nil
+		return c.OSCommand.ShellCommandFromString(command), nil
 	}
 
 	return nil, c.OSCommand.RunCommand(command)
diff --git a/pkg/commands/os.go b/pkg/commands/os.go
index a27196f34..b3358b170 100644
--- a/pkg/commands/os.go
+++ b/pkg/commands/os.go
@@ -118,6 +118,19 @@ func (c *OSCommand) ExecutableFromString(commandStr string) *exec.Cmd {
 	return cmd
 }
 
+// ShellCommandFromString takes a string like `git commit` and returns an executable shell command for it
+func (c *OSCommand) ShellCommandFromString(commandStr string) *exec.Cmd {
+	quotedCommand := ""
+	// Windows does not seem to like quotes around the command
+	if c.Platform.os == "windows" {
+		quotedCommand = commandStr
+	} else {
+		quotedCommand = c.Quote(commandStr)
+	}
+
+	return c.ExecutableFromString(fmt.Sprintf("%s %s %s", c.Platform.shell, c.Platform.shellArg, quotedCommand))
+}
+
 // RunCommandWithOutputLive runs RunCommandWithOutputLiveWrapper
 func (c *OSCommand) RunCommandWithOutputLive(command string, output func(string) string) error {
 	return RunCommandWithOutputLiveWrapper(c, command, output)