project: Fixed issue with fetching revision SHA

Fixes: #139

Fixes the issue of fetching SHAs when specified in manifest file.
It is checked if a revision is a SHA, in which case the fetch is
performed on the url and afterwards the manifest-rev reference is
updated to the SHA.

Signed-off-by: Torsten Rasmussen <torsten.rasmussen@nordicsemi.no>

src/west/commands/project.py

@@ -710,6 +710,11 @@ def _fetch(project):
     # separately.
     #
     # --tags is required to get tags when the remote is specified as an URL.
+    if _is_sha(project.revision):
+        # Don't fetch a SHA directly, as server may restrict from doing so.
+        _git(project, fetch_cmd + ' --tags -- (url)')
+        _git(project, 'update-ref (qual-manifest-rev-branch) (revision)')
+    else:
         _git(project, fetch_cmd + ' --tags -- (url) (revision)')
         _git(project, 'update-ref (qual-manifest-rev-branch) FETCH_HEAD^{commit}')