diff --git a/src/Composer/IO/BaseIO.php b/src/Composer/IO/BaseIO.php
index 32a9171f3..44bd73062 100644
--- a/src/Composer/IO/BaseIO.php
+++ b/src/Composer/IO/BaseIO.php
@@ -124,7 +124,9 @@ abstract class BaseIO implements IOInterface
         }
 
         foreach ($githubOauth as $domain => $token) {
-            if (!preg_match('{^[.a-z0-9]+$}', $token)) {
+            // allowed chars for GH tokens are from https://github.blog/changelog/2021-03-04-authentication-token-format-updates/
+            // plus dots which were at some point used for GH app integration tokens
+            if (!preg_match('{^[.A-Za-z0-9_]+$}', $token)) {
                 throw new \UnexpectedValueException('Your github oauth token for '.$domain.' contains invalid characters: "'.$token.'"');
             }
             $this->checkAndSetAuthentication($domain, $token, 'x-oauth-basic');
diff --git a/src/Composer/Repository/VcsRepository.php b/src/Composer/Repository/VcsRepository.php
index 148f587d4..80d24f7a1 100644
--- a/src/Composer/Repository/VcsRepository.php
+++ b/src/Composer/Repository/VcsRepository.php
@@ -247,7 +247,7 @@ class VcsRepository extends ArrayRepository implements ConfigurableRepositoryInt
                     continue;
                 }
 
-                $tagPackageName = isset($data['name']) ? $data['name'] : $this->packageName;
+                $tagPackageName = $this->packageName ?: (isset($data['name']) ? $data['name'] : '');
                 if ($existingPackage = $this->findPackage($tagPackageName, $data['version_normalized'])) {
                     if ($isVeryVerbose) {
                         $this->io->writeError('<warning>Skipped tag '.$tag.', it conflicts with an another tag ('.$existingPackage->getPrettyVersion().') as both resolve to '.$data['version_normalized'].' internally</warning>');
@@ -386,6 +386,8 @@ class VcsRepository extends ArrayRepository implements ConfigurableRepositoryInt
     protected function preProcess(VcsDriverInterface $driver, array $data, $identifier)
     {
         // keep the name of the main identifier for all packages
+        // this ensures that a package can be renamed in one place and that all old tags
+        // will still be installable using that new name without requiring re-tagging
         $dataPackageName = isset($data['name']) ? $data['name'] : null;
         $data['name'] = $this->packageName ?: $dataPackageName;
 
diff --git a/src/Composer/Util/ProcessExecutor.php b/src/Composer/Util/ProcessExecutor.php
index 47ea0b359..88dd5ae84 100644
--- a/src/Composer/Util/ProcessExecutor.php
+++ b/src/Composer/Util/ProcessExecutor.php
@@ -89,7 +89,8 @@ class ProcessExecutor
     {
         if ($this->io && $this->io->isDebug()) {
             $safeCommand = preg_replace_callback('{://(?P<user>[^:/\s]+):(?P<password>[^@\s/]+)@}i', function ($m) {
-                if (preg_match('{^[a-f0-9]{12,}$}', $m['user'])) {
+                // if the username looks like a long (12char+) hex string, or a modern github token (e.g. gp1_xxx) we obfuscate that
+                if (preg_match('{^([a-f0-9]{12,}|g[a-z]\d_[a-zA-Z0-9_]+)$}', $m['user'])) {
                     return '://***:***@';
                 }
 
diff --git a/src/Composer/Util/Url.php b/src/Composer/Util/Url.php
index bbe6c67a7..18859fb23 100644
--- a/src/Composer/Util/Url.php
+++ b/src/Composer/Util/Url.php
@@ -110,7 +110,8 @@ class Url
         $url = preg_replace('{([&?]access_token=)[^&]+}', '$1***', $url);
 
         $url = preg_replace_callback('{(?P<prefix>://|^)(?P<user>[^:/\s@]+):(?P<password>[^@\s/]+)@}i', function ($m) {
-            if (preg_match('{^[a-f0-9]{12,}$}', $m['user'])) {
+            // if the username looks like a long (12char+) hex string, or a modern github token (e.g. gp1_xxx) we obfuscate that
+            if (preg_match('{^([a-f0-9]{12,}|g[a-z]\d_[a-zA-Z0-9_]+)$}', $m['user'])) {
                 return $m['prefix'].'***:***@';
             }