$ git clone -n https://src.fedoraproject.org/rpms/ongres-stringprep.git /var/lib/mock/f40-build-2606582-63577/root/chroot_tmpdir/scmroot/ongres-stringprep
Cloning into '/var/lib/mock/f40-build-2606582-63577/root/chroot_tmpdir/scmroot/ongres-stringprep'...
$ git fetch origin 7c3178d83d33f0cf7d8536615a12dbcb914c7cce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ongres-stringprep
 * [new ref]         7c3178d83d33f0cf7d8536615a12dbcb914c7cce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c3178d Add generic javapackages test