$ git clone -n https://src.fedoraproject.org/rpms/erlang-oauth2.git /var/lib/mock/f41-build-1144811-21156/root/chroot_tmpdir/scmroot/erlang-oauth2
Cloning into '/var/lib/mock/f41-build-1144811-21156/root/chroot_tmpdir/scmroot/erlang-oauth2'...
$ git fetch origin e443f1c871ca0df28ea0331dadf7037e4becba5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-oauth2
 * [new ref]         e443f1c871ca0df28ea0331dadf7037e4becba5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e443f1c Switch to Rebar3