$ git clone -n https://src.fedoraproject.org/rpms/hibernate-jpa-2.0-api.git /var/lib/mock/f41-build-1146726-21201/root/chroot_tmpdir/scmroot/hibernate-jpa-2.0-api
Cloning into '/var/lib/mock/f41-build-1146726-21201/root/chroot_tmpdir/scmroot/hibernate-jpa-2.0-api'...
$ git fetch origin 5709d469cc9105bd6d1b7a8a53863f05892545a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hibernate-jpa-2.0-api
 * [new ref]         5709d469cc9105bd6d1b7a8a53863f05892545a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5709d46 Eliminate use of obsolete %patchN syntax (#2283636)