diff --git a/contrib/build-wine/build-electrum-git.sh b/contrib/build-wine/build-electrum-git.sh
index 2a72d9581..013e63443 100755
--- a/contrib/build-wine/build-electrum-git.sh
+++ b/contrib/build-wine/build-electrum-git.sh
@@ -27,6 +27,13 @@ git clone https://github.com/spesmilo/electrum -b master
 
 pushd electrum
 if [ ! -z "$1" ]; then
+    # a commit/tag/branch was specified
+    if ! git cat-file -e "$1" 2> /dev/null
+    then  # can't find target
+        # try pull requests
+        git config --local --add remote.origin.fetch '+refs/pull/*/head:refs/remotes/origin/pr/*'
+        git fetch --all
+    fi
     git checkout $1
 fi