download/v5.8.x-from-git: added variant for direct git branch 5.8 che…

…ckout

docs/download/v5.8.x-from-git.md

@@ -7,12 +7,21 @@ stable branch 5.8 (release series v5.8.x).
 
 Direct download of sources from GIT for latest Kamailio v5.8.x.
 
-      git clone --depth 1 --no-single-branch https://github.com/kamailio/kamailio kamailio
-      cd kamailio
-      git checkout -b 5.8 origin/5.8
+```
+    git clone --depth 1 --no-single-branch https://github.com/kamailio/kamailio kamailio
+    cd kamailio
+    git checkout -b 5.8 origin/5.8
+```
 
 *Note: if your git client version does not support **–no-single-branch**
 command line parameter, then just remove it.*
 
+Or, for newer git versions, with direct branch 5.8 checkout:
+
+```
+    git clone --depth 1 --branch 5.8 https://github.com/kamailio/kamailio kamailio
+    cd kamailio
+```
+
 *Note: if you want to have the full commit history, then remove
 **--depth 1** command line parameter.*