Inspect the element at the top-right which says "stash" on it. Just above it,
you'll see an element with the class "aui-sidebar-body". Select that, and
then under rules (to the right), disable "overflow-y: auto". That will make a
menu show up. If you're inside a repository, one button in this menu will say
"clone"; right-click, "Copy Link Location". This is the Git URL you can use
to clone with.
For example, to clone the Popcorn Time app, the Git URL is
https://git.popcorntime.io/stash/scm/pt/popcorn-app.git. So you can clone it
with:
git clone https://git.popcorntime.io/stash/scm/pt/popcorn-app.git