$ git clone -n https://src.fedoraproject.org/rpms/pgbouncer.git /var/lib/mock/f42-build-side-1-3523524-46210/root/chroot_tmpdir/scmroot/pgbouncer
Cloning into '/var/lib/mock/f42-build-side-1-3523524-46210/root/chroot_tmpdir/scmroot/pgbouncer'...
$ git fetch origin d65987e744b1c06fc647a303ebf9905d1869129c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pgbouncer
 * [new ref]         d65987e744b1c06fc647a303ebf9905d1869129c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d65987e Disablet tests on i386