I noticed that during builds with branched/devel packages, that all downloads
were being forced through the OBS API. Examples are devel:languages:rust/rust
and home:firstyear:branches:devel:languages:rust/rust. 

Observing the build XML (./.osc/_buildinfo-openSUSE_Tumbleweed-x86_64.xml)
during a local osc build, I noted that repositories were set to "dod". IE:

  <bdep name="file" version="5.40" release="1.13" arch="x86_64"
project="openSUSE:Tumbleweed" repository="dod"/>

This causes the package to miss on the download URL, and then forces a full
download from the API.

However, doing an osc co openSUSE:Factory/<pkg> works correctly and returns
valid repo locations (./.osc/_buildinfo-standard-x86_64.xml):

  <bdep name="libtevent-devel" version="0.10.2" release="1.7" arch="x86_64"
project="openSUSE:Factory" repository="standard"/>


I have previously been advised that using the API is not recommended due to
load on OBS, so I'm wondering if this behaviour is a flaw or bug?