Variable expansion in COPR external URL?

[Dave Johansen]

How can I do a variable expansion that doesn't have - before and after? I
tried "slc${releasever}X" [1] and "slc$releaseverX" [2] but neither worked.
Thanks,
Dave

[1]:
https://copr-be.cloud.fedoraproject.org/results/daveisfera/odb_2.3_cern/epel-5-i386/00128584-odb/root.log.gz
[2]:
https://copr-be.cloud.fedoraproject.org/results/daveisfera/odb_2.3_cern/epel-5-i386/00128585-odb/root.log.gz
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