diff --git a/poky/bitbake/lib/bb/fetch2/__init__.py b/poky/bitbake/lib/bb/fetch2/__init__.py
index 747356d..cf65727 100644
--- a/poky/bitbake/lib/bb/fetch2/__init__.py
+++ b/poky/bitbake/lib/bb/fetch2/__init__.py
@@ -855,7 +855,9 @@
                      'AWS_PROFILE',
                      'AWS_ACCESS_KEY_ID',
                      'AWS_SECRET_ACCESS_KEY',
-                     'AWS_DEFAULT_REGION']
+                     'AWS_DEFAULT_REGION',
+                     'GIT_CACHE_PATH',
+                     'SSL_CERT_DIR']
 
 def get_fetcher_environment(d):
     newenv = {}
diff --git a/poky/bitbake/lib/bb/fetch2/git.py b/poky/bitbake/lib/bb/fetch2/git.py
index 2e3d325..5bb8393 100644
--- a/poky/bitbake/lib/bb/fetch2/git.py
+++ b/poky/bitbake/lib/bb/fetch2/git.py
@@ -417,8 +417,7 @@
             # It would be nice to just do this inline here by running 'git-lfs fetch'
             # on the bare clonedir, but that operation requires a working copy on some
             # releases of Git LFS.
-            tmpdir = tempfile.mkdtemp(dir=d.getVar('DL_DIR'))
-            try:
+            with tempfile.TemporaryDirectory(dir=d.getVar('DL_DIR')) as tmpdir:
                 # Do the checkout. This implicitly involves a Git LFS fetch.
                 Git.unpack(self, ud, tmpdir, d)
 
@@ -436,8 +435,6 @@
                 # downloaded.
                 if os.path.exists(os.path.join(tmpdir, "git", ".git", "lfs")):
                     runfetchcmd("tar -cf - lfs | tar -xf - -C %s" % ud.clonedir, d, workdir="%s/git/.git" % tmpdir)
-            finally:
-                bb.utils.remove(tmpdir, recurse=True)
 
     def build_mirror_data(self, ud, d):
 
@@ -660,11 +657,6 @@
         Check if the repository has 'lfs' (large file) content
         """
 
-        if not ud.nobranch:
-            branchname = ud.branches[ud.names[0]]
-        else:
-            branchname = "master"
-
         # The bare clonedir doesn't use the remote names; it has the branch immediately.
         if wd == ud.clonedir:
             refname = ud.branches[ud.names[0]]
diff --git a/poky/bitbake/lib/bb/fetch2/gitsm.py b/poky/bitbake/lib/bb/fetch2/gitsm.py
index fee40cd..f8e239b 100644
--- a/poky/bitbake/lib/bb/fetch2/gitsm.py
+++ b/poky/bitbake/lib/bb/fetch2/gitsm.py
@@ -90,7 +90,7 @@
                 # Convert relative to absolute uri based on parent uri
                 if  uris[m].startswith('..') or uris[m].startswith('./'):
                     newud = copy.copy(ud)
-                    newud.path = os.path.realpath(os.path.join(newud.path, uris[m]))
+                    newud.path = os.path.normpath(os.path.join(newud.path, uris[m]))
                     uris[m] = Git._get_repo_url(self, newud)
 
         for module in submodules:
diff --git a/poky/bitbake/lib/bb/fetch2/npmsw.py b/poky/bitbake/lib/bb/fetch2/npmsw.py
index a8c4d35..36fcbfb 100644
--- a/poky/bitbake/lib/bb/fetch2/npmsw.py
+++ b/poky/bitbake/lib/bb/fetch2/npmsw.py
@@ -129,10 +129,28 @@
 
                 localpath = os.path.join(d.getVar("DL_DIR"), localfile)
 
+            # Handle local tarball and link sources
+            elif version.startswith("file"):
+                localpath = version[5:]
+                if not version.endswith(".tgz"):
+                    unpack = False
+
             # Handle git sources
-            elif version.startswith("git"):
+            elif version.startswith(("git", "bitbucket","gist")) or (
+                not version.endswith((".tgz", ".tar", ".tar.gz"))
+                and not version.startswith((".", "@", "/"))
+                and "/" in version
+            ):
                 if version.startswith("github:"):
                     version = "git+https://github.com/" + version[len("github:"):]
+                elif version.startswith("gist:"):
+                    version = "git+https://gist.github.com/" + version[len("gist:"):]
+                elif version.startswith("bitbucket:"):
+                    version = "git+https://bitbucket.org/" + version[len("bitbucket:"):]
+                elif version.startswith("gitlab:"):
+                    version = "git+https://gitlab.com/" + version[len("gitlab:"):]
+                elif not version.startswith(("git+","git:")):
+                    version = "git+https://github.com/" + version
                 regex = re.compile(r"""
                     ^
                     git\+
@@ -158,12 +176,6 @@
 
                 url = str(uri)
 
-            # Handle local tarball and link sources
-            elif version.startswith("file"):
-                localpath = version[5:]
-                if not version.endswith(".tgz"):
-                    unpack = False
-
             else:
                 raise ParameterError("Unsupported dependency: %s" % name, ud.url)
 
diff --git a/poky/bitbake/lib/bb/fetch2/wget.py b/poky/bitbake/lib/bb/fetch2/wget.py
index 696e918..859b4f9 100644
--- a/poky/bitbake/lib/bb/fetch2/wget.py
+++ b/poky/bitbake/lib/bb/fetch2/wget.py
@@ -26,7 +26,6 @@
 from   bb.fetch2 import FetchError
 from   bb.fetch2 import logger
 from   bb.fetch2 import runfetchcmd
-from   bb.utils import export_proxies
 from   bs4 import BeautifulSoup
 from   bs4 import SoupStrainer
 
@@ -361,10 +360,11 @@
 
                 try:
                     import netrc
-                    n = netrc.netrc()
-                    login, unused, password = n.authenticators(urllib.parse.urlparse(uri).hostname)
-                    add_basic_auth("%s:%s" % (login, password), r)
-                except (TypeError, ImportError, IOError, netrc.NetrcParseError):
+                    auth_data = netrc.netrc().authenticators(urllib.parse.urlparse(uri).hostname)
+                    if auth_data:
+                        login, _, password = auth_data
+                        add_basic_auth("%s:%s" % (login, password), r)
+                except (FileNotFoundError, netrc.NetrcParseError):
                     pass
 
                 with opener.open(r, timeout=30) as response: