$ git clone -n https://src.fedoraproject.org/rpms/pgbouncer.git /var/lib/mock/f45-build-27786-626/root/chroot_tmpdir/scmroot/pgbouncer
Cloning into '/var/lib/mock/f45-build-27786-626/root/chroot_tmpdir/scmroot/pgbouncer'...
$ git fetch origin a25d24a990dadbcdc56264949a0edd76c49708a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pgbouncer
 * [new ref]         a25d24a990dadbcdc56264949a0edd76c49708a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a25d24a [PATCH] Avoid reaching into struct asn1_string_st