$ git clone -n https://src.fedoraproject.org/rpms/osgi-core.git /var/lib/mock/f40-build-2166806-50976/root/chroot_tmpdir/scmroot/osgi-core
Cloning into '/var/lib/mock/f40-build-2166806-50976/root/chroot_tmpdir/scmroot/osgi-core'...
$ git fetch origin eec13ebc6e4fd1c683bf202002b15396c6eee514:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/osgi-core
 * [new ref]         eec13ebc6e4fd1c683bf202002b15396c6eee514 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eec13eb Update javapackages test plan to f40