Add description of AOMP_CHECK_GIT_BRANCH to build previous versions of AOMP without incorrect branch build errors.
@@ -111,6 +111,7 @@ The development version is the next version to be released. It is possible that
```
git checkout rel_11.5-0
git pull
+ export AOMP_CHECK_GIT_BRANCH=0 //Tags will be used to checkout various repos. This will ignore the detached head state to avoid build errors.
```
<b>Clone and Build:</b>
```
