$ git clone -n https://src.fedoraproject.org/rpms/erlang.git /var/lib/mock/f31-build-53224-27827/root/thebuilddir/tmp/scmroot/erlang
Cloning into '/var/lib/mock/f31-build-53224-27827/root/thebuilddir/tmp/scmroot/erlang'...
$ git reset --hard 0eb78c92803fc5c740b4a44269dd0807fd2c5eb6
HEAD is now at 0eb78c9 Erlang ver. 21.3.8.6