$ git clone -n https://src.fedoraproject.org/rpms/junit5.git /var/lib/mock/f41-build-725104-13118/root/chroot_tmpdir/scmroot/junit5
Cloning into '/var/lib/mock/f41-build-725104-13118/root/chroot_tmpdir/scmroot/junit5'...
$ git fetch origin 14772822700d6f16bd1d0ac6346dc11687202e64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/junit5
 * [new ref]         14772822700d6f16bd1d0ac6346dc11687202e64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1477282 Switch to a newer %patch syntax