$ git clone -n https://src.fedoraproject.org/rpms/erlang-oauth2.git /var/lib/mock/f40-build-1915191-25086/root/chroot_tmpdir/scmroot/erlang-oauth2
Cloning into '/var/lib/mock/f40-build-1915191-25086/root/chroot_tmpdir/scmroot/erlang-oauth2'...
$ git fetch origin 48875cf08590ff537a545edee8cb79526616581d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-oauth2
 * [new ref]         48875cf08590ff537a545edee8cb79526616581d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48875cf Remove binary diff