$ git clone -n https://src.fedoraproject.org/rpms/postgresql-jdbc.git /var/lib/mock/f41-build-756801-13422/root/chroot_tmpdir/scmroot/postgresql-jdbc
Cloning into '/var/lib/mock/f41-build-756801-13422/root/chroot_tmpdir/scmroot/postgresql-jdbc'...
$ git fetch origin fade92f5f8a349ab0c31839fa1c7c49eabf6ac23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/postgresql-jdbc
 * [new ref]         fade92f5f8a349ab0c31839fa1c7c49eabf6ac23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fade92f rebase to upstream version 42.7.3