Compose _hash_url variable in function _getRepoHash() function from HASH_URL variable

acme.sh

@@ -8,6 +8,8 @@ PROJECT_ENTRY="acme.sh"
 
 PROJECT="https://github.com/acmesh-official/$PROJECT_NAME"
 
+HASH_URL="https://api.github.com/repos/acmesh-official/$PROJECT_NAME/git/refs/"
+
 DEFAULT_INSTALL_HOME="$HOME/.$PROJECT_NAME"
 
 _WINDOWS_SCHEDULER_NAME="$PROJECT_NAME.cron"
@@ -6379,7 +6381,7 @@ _installOnline() {
 _getRepoHash() {
   _hash_path=$1
   shift
-  _hash_url="https://api.github.com/repos/acmesh-official/$PROJECT_NAME/git/refs/$_hash_path"
+  _hash_url="$HASH_URL$_hash_path"
   _get $_hash_url | tr -d "\r\n" | tr '{},' '\n' | grep '"sha":' | cut -d '"' -f 4
 }