rename for explicity

Author: extrawurst

CHANGELOG.md

@@ -24,7 +24,7 @@ but this also allows us now to define colors in the common hex format:
 Checkout [THEMES.md](./THEMES.md) for more info.
 
 ### Added
-* support `TAR_COMMIT_ID` enabling builds from `git archive` generated source tarballs or other outside a git repo [[@alerque](https://github.com/alerque)] ([#2187](https://github.com/extrawurst/gitui/pull/2187))
+* support `BUILD_GIT_COMMIT_ID` enabling builds from `git archive` generated source tarballs or other outside a git repo [[@alerque](https://github.com/alerque)] ([#2187](https://github.com/extrawurst/gitui/pull/2187))
 
 ### Fixes
 * update yanked dependency to `libc` to fix building with `--locked`.

build.rs

@@ -5,7 +5,7 @@ fn get_git_hash() -> String {
 
 	// Allow builds from `git archive` generated tarballs if output of `git get-tar-commit-id` is
 	// set in an env var.
-	if let Ok(commit) = std::env::var("TAR_COMMIT_ID") {
+	if let Ok(commit) = std::env::var("BUILD_GIT_COMMIT_ID") {
 		return commit[..7].to_string();
 	};
 	let commit = Command::new("git")