Obtain remote URL by calling "ls-remote --get-url" instead of using git config

This has the advantage that it still works when the user has configured aliases
using the insteadOf feature [1].

[1] https://git-scm.com/docs/git-config/2.42.0#Documentation/git-config.txt-urlltbasegtinsteadOf)

pkg/commands/git_commands/remote.go

@@ -2,6 +2,7 @@ package git_commands
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/jesseduffield/gocui"
 )
@@ -74,3 +75,14 @@ func (self *RemoteCommands) CheckRemoteBranchExists(branchName string) bool {
 
 	return err == nil
 }
+
+// Resolve what might be a aliased URL into a full URL
+// SEE: `man -P 'less +/--get-url +n' git-ls-remote`
+func (self *RemoteCommands) GetRemoteURL(remoteName string) (string, error) {
+	cmdArgs := NewGitCmd("ls-remote").
+		Arg("--get-url", remoteName).
+		ToArgv()
+
+	url, err := self.cmd.New(cmdArgs).RunWithOutput()
+	return strings.TrimSpace(url), err
+}

pkg/gui/controllers/helpers/host_helper.go

@@ -24,18 +24,28 @@ func NewHostHelper(
 }
 
 func (self *HostHelper) GetPullRequestURL(from string, to string) (string, error) {
-	return self.getHostingServiceMgr().GetPullRequestURL(from, to)
+	mgr, err := self.getHostingServiceMgr()
+	if err != nil {
+		return "", err
+	}
+	return mgr.GetPullRequestURL(from, to)
 }
 
 func (self *HostHelper) GetCommitURL(commitSha string) (string, error) {
-	return self.getHostingServiceMgr().GetCommitURL(commitSha)
+	mgr, err := self.getHostingServiceMgr()
+	if err != nil {
+		return "", err
+	}
+	return mgr.GetCommitURL(commitSha)
 }
 
 // getting this on every request rather than storing it in state in case our remoteURL changes
-// from one invocation to the next. Note however that we're currently caching config
-// results so we might want to invalidate the cache here if it becomes a problem.
-func (self *HostHelper) getHostingServiceMgr() *hosting_service.HostingServiceMgr {
-	remoteUrl := self.c.Git().Config.GetRemoteURL()
+// from one invocation to the next.
+func (self *HostHelper) getHostingServiceMgr() (*hosting_service.HostingServiceMgr, error) {
+	remoteUrl, err := self.c.Git().Remote.GetRemoteURL("origin")
+	if err != nil {
+		return nil, err
+	}
 	configServices := self.c.UserConfig.Services
-	return hosting_service.NewHostingServiceMgr(self.c.Log, self.c.Tr, remoteUrl, configServices)
+	return hosting_service.NewHostingServiceMgr(self.c.Log, self.c.Tr, remoteUrl, configServices), nil
 }