$ git clone -n https://src.fedoraproject.org/rpms/erlang-p1_pgsql.git /var/lib/mock/f40-build-1284993-23240/root/chroot_tmpdir/scmroot/erlang-p1_pgsql
Cloning into '/var/lib/mock/f40-build-1284993-23240/root/chroot_tmpdir/scmroot/erlang-p1_pgsql'...
$ git fetch origin 5a1345548dbb7fca41e9a12d55425813f72f2bfa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-p1_pgsql
 * [new ref]         5a1345548dbb7fca41e9a12d55425813f72f2bfa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a13455 p1_pgsql ver. 1.1.26