diff --git a/docs/maintainers/vcpkg_from_git.md b/docs/maintainers/vcpkg_from_git.md
index 4b9a26c6211..2feed49aa36 100644
--- a/docs/maintainers/vcpkg_from_git.md
+++ b/docs/maintainers/vcpkg_from_git.md
@@ -19,7 +19,7 @@ Specifies the out-variable that will contain the extracted location.
 This should be set to `SOURCE_PATH` by convention.
 
 ### URL
-The url of the git repository.  Must start with `https`.
+The url of the git repository.
 
 ### REF
 The git sha of the commit to download.
diff --git a/scripts/cmake/vcpkg_from_git.cmake b/scripts/cmake/vcpkg_from_git.cmake
index bad5384ca4a..f114f6fc6f2 100644
--- a/scripts/cmake/vcpkg_from_git.cmake
+++ b/scripts/cmake/vcpkg_from_git.cmake
@@ -19,7 +19,7 @@
 ## This should be set to `SOURCE_PATH` by convention.
 ##
 ## ### URL
-## The url of the git repository.  Must start with `https`.
+## The url of the git repository.
 ##
 ## ### REF
 ## The git sha of the commit to download.
@@ -49,13 +49,6 @@ function(vcpkg_from_git)
     message(FATAL_ERROR "The git url must be specified")
   endif()
 
-  if( NOT _vdud_URL MATCHES "^https:")
-    # vcpkg_from_git does not support a SHA256 parameter because hashing the git archive is
-    # not stable across all supported platforms.  The tradeoff is to require https to download
-    # and the ref to be the git sha (i.e. not things that can change like a label)
-    message(FATAL_ERROR "The git url must be https")
-  endif()
-
   if(NOT DEFINED _vdud_REF)
     message(FATAL_ERROR "The git ref must be specified.")
   endif()
diff --git a/toolsrc/src/vcpkg/base/system.process.cpp b/toolsrc/src/vcpkg/base/system.process.cpp
index bba29a2d738..5f34ace2a7f 100644
--- a/toolsrc/src/vcpkg/base/system.process.cpp
+++ b/toolsrc/src/vcpkg/base/system.process.cpp
@@ -241,6 +241,12 @@ namespace vcpkg
             // Enables proxy information to be passed to Curl, the underlying download library in cmake.exe
             L"http_proxy",
             L"https_proxy",
+            // Environment variables to tell git to use custom SSH executable or command
+            L"GIT_SSH",
+            L"GIT_SSH_COMMAND",
+            // Environment variables needed for ssh-agent based authentication
+            L"SSH_AUTH_SOCK",
+            L"SSH_AGENT_PID",
             // Enables find_package(CUDA) and enable_language(CUDA) in CMake
             L"CUDA_PATH",
             L"CUDA_PATH_V9_0",