try to fix defective "Git on Borg" repos

checkout.go

@@ -1,6 +1,7 @@
 package gitpb
 
 import (
+	"os"
 	"path/filepath"
 
 	"go.wit.com/log"
@@ -8,6 +9,20 @@ import (
 
 func (repo *Repo) CheckoutMaster() bool {
 	bName := repo.GetMasterBranchName()
+	if bName == "giterr" {
+		cmd := []string{"git", "checkout", "main"} // todo: figure out main
+		repo.RunVerbose(cmd)
+		os.Exit(-1)
+		// TODO: try to fix this
+		if repo.checkoutBranch("main") {
+			repo.MasterBranchName = "main"
+			return true
+		} else {
+			cmd := []string{"git", "checkout", "main"} // todo: figure out main
+			repo.RunVerbose(cmd)
+			return false
+		}
+	}
 	if repo.checkoutBranch(bName) {
 		return true
 	}

reload.go

@@ -21,6 +21,15 @@ func (repo *Repo) ReloadCheck() error {
 
 // TODO: clean this up more, but it is working now more or less
 func (repo *Repo) Reload() error {
+	// sometimes, on new repos, if .git/HEAD does not exist
+	// defective git daemons or badly configured repos, 'git clone' can fail
+	// if so, 'git fetch origin' can repair the state
+	if !repo.Exists(".git/HEAD") {
+		cmd := []string{"git", "fetch", "origin"}
+		repo.RunVerbose(cmd)
+		cmd = []string{"git", "checkout", "main"} // todo: figure out main
+		repo.RunVerbose(cmd)
+	}
 	// log.Info("in reload", repo.FullPath)
 	repo.Tags = new(GitTags)
 	repo.reloadGitTags()