fix(git): respect GIT_SSH_COMMAND and GIT_SSH (#4381)

* Respect GIT_SSH(_COMMAND)

* Version bumps

* Backticks

* chore: versions

Co-authored-by: merceyz <[email protected]>

Author: cwstra

.yarn/versions/fde815c3.yml

@@ -0,0 +1,25 @@
+releases:
+  "@yarnpkg/cli": patch
+  "@yarnpkg/plugin-git": patch
+
+declined:
+  - "@yarnpkg/plugin-compat"
+  - "@yarnpkg/plugin-constraints"
+  - "@yarnpkg/plugin-dlx"
+  - "@yarnpkg/plugin-essentials"
+  - "@yarnpkg/plugin-github"
+  - "@yarnpkg/plugin-init"
+  - "@yarnpkg/plugin-interactive-tools"
+  - "@yarnpkg/plugin-nm"
+  - "@yarnpkg/plugin-npm-cli"
+  - "@yarnpkg/plugin-pack"
+  - "@yarnpkg/plugin-patch"
+  - "@yarnpkg/plugin-pnp"
+  - "@yarnpkg/plugin-pnpm"
+  - "@yarnpkg/plugin-stage"
+  - "@yarnpkg/plugin-typescript"
+  - "@yarnpkg/plugin-version"
+  - "@yarnpkg/plugin-workspace-tools"
+  - "@yarnpkg/builder"
+  - "@yarnpkg/core"
+  - "@yarnpkg/doctor"

packages/plugin-git/sources/gitUtils.ts

@@ -11,7 +11,7 @@ function makeGitEnvironment() {
   return {
     ...process.env,
     // An option passed to SSH by Git to prevent SSH from asking for data (which would cause installs to hang when the SSH keys are missing)
-    GIT_SSH_COMMAND: `ssh -o BatchMode=yes`,
+    GIT_SSH_COMMAND: process.env.GIT_SSH_COMMAND || `${process.env.GIT_SSH || `ssh`} -o BatchMode=yes`,
   };
 }